diff --git a/prothsync/src/main/java/com/prothsync/prothsync/repository/impl/PostRepositoryImpl.java b/prothsync/src/main/java/com/prothsync/prothsync/repository/impl/PostRepositoryImpl.java
index 098f6bd..4265224 100644
--- a/prothsync/src/main/java/com/prothsync/prothsync/repository/impl/PostRepositoryImpl.java
+++ b/prothsync/src/main/java/com/prothsync/prothsync/repository/impl/PostRepositoryImpl.java
@@ -64,6 +64,13 @@ public Page<Post> findAllByHashtagIdAndVisibilityPublic(Long hashtagId, Pageable
         return postJpaRepository.findAllByHashtagIdAndVisibilityPublic(hashtagId, pageable);
     }
 
+    @Override
+    public Page<Post> findAllByHashtagIdAndVisibilityPublicExcludingBlockedUsers(
+        Long hashtagId, Long currentUserId, Pageable pageable) {
+        return postJpaRepository.findAllByHashtagIdAndVisibilityPublicExcludingBlockedUsers(
+            hashtagId, currentUserId, pageable);
+    }
+
     @Override
     public long count() {
         return postJpaRepository.count();
diff --git a/prothsync/src/main/java/com/prothsync/prothsync/repository/impl/UserRepositoryImpl.java b/prothsync/src/main/java/com/prothsync/prothsync/repository/impl/UserRepositoryImpl.java
index 84c68ab..4084f15 100644
--- a/prothsync/src/main/java/com/prothsync/prothsync/repository/impl/UserRepositoryImpl.java
+++ b/prothsync/src/main/java/com/prothsync/prothsync/repository/impl/UserRepositoryImpl.java
@@ -80,6 +80,12 @@ public Page<User> searchByNickName(String keyword, Pageable pageable) {
         return userJpaRepository.findByNickNameContainingIgnoreCase(keyword, pageable);
     }
 
+    @Override
+    public Page<User> searchByNickNameExcludingBlockedUsers(
+        String keyword, Long currentUserId, Pageable pageable) {
+        return userJpaRepository.searchByNickNameExcludingBlockedUsers(keyword, currentUserId, pageable);
+    }
+
     @Override
     public Page<User> findAll(Pageable pageable) {
         return userJpaRepository.findAll(pageable);
diff --git a/prothsync/src/main/java/com/prothsync/prothsync/repository/jpa/PostJpaRepository.java b/prothsync/src/main/java/com/prothsync/prothsync/repository/jpa/PostJpaRepository.java
index 2208c5a..d1bc401 100644
--- a/prothsync/src/main/java/com/prothsync/prothsync/repository/jpa/PostJpaRepository.java
+++ b/prothsync/src/main/java/com/prothsync/prothsync/repository/jpa/PostJpaRepository.java
@@ -37,6 +37,22 @@ WHERE p.postId IN (
     Page<Post> findAllByHashtagIdAndVisibilityPublic(
         @Param("hashtagId") Long hashtagId, Pageable pageable);
 
+    @Query("""
+        SELECT p FROM Post p
+        WHERE p.postId IN (
+            SELECT ph.postId FROM PostHashtag ph WHERE ph.hashtagId = :hashtagId
+        )
+        AND p.visibility = 'PUBLIC'
+        AND p.userId NOT IN (
+            SELECT b.blockedId FROM Block b WHERE b.blockerId = :currentUserId
+        )
+        ORDER BY p.createdAt DESC
+        """)
+    Page<Post> findAllByHashtagIdAndVisibilityPublicExcludingBlockedUsers(
+        @Param("hashtagId") Long hashtagId,
+        @Param("currentUserId") Long currentUserId,
+        Pageable pageable);
+
     List<Post> findAllByPostIdIn(List<Long> postIds);
 
     @Modifying
diff --git a/prothsync/src/main/java/com/prothsync/prothsync/repository/jpa/UserJpaRepository.java b/prothsync/src/main/java/com/prothsync/prothsync/repository/jpa/UserJpaRepository.java
index ab93a2b..0ba75ae 100644
--- a/prothsync/src/main/java/com/prothsync/prothsync/repository/jpa/UserJpaRepository.java
+++ b/prothsync/src/main/java/com/prothsync/prothsync/repository/jpa/UserJpaRepository.java
@@ -108,6 +108,18 @@ List<User> findNearbyUsersByType(
 
     Page<User> findByNickNameContainingIgnoreCase(String keyword, Pageable pageable);
 
+    @Query("""
+        SELECT u FROM User u
+        WHERE LOWER(u.nickName) LIKE LOWER(CONCAT('%', :keyword, '%'))
+        AND u.userId NOT IN (
+            SELECT b.blockedId FROM Block b WHERE b.blockerId = :currentUserId
+        )
+        """)
+    Page<User> searchByNickNameExcludingBlockedUsers(
+        @Param("keyword") String keyword,
+        @Param("currentUserId") Long currentUserId,
+        Pageable pageable);
+
     Page<User> findAll(Pageable pageable);
 
     @Modifying
diff --git a/prothsync/src/main/java/com/prothsync/prothsync/repository/repository/PostRepository.java b/prothsync/src/main/java/com/prothsync/prothsync/repository/repository/PostRepository.java
index 217b93f..4cc81e9 100644
--- a/prothsync/src/main/java/com/prothsync/prothsync/repository/repository/PostRepository.java
+++ b/prothsync/src/main/java/com/prothsync/prothsync/repository/repository/PostRepository.java
@@ -24,6 +24,9 @@ public interface PostRepository {
 
     Page<Post> findAllByHashtagIdAndVisibilityPublic(Long hashtagId, Pageable pageable);
 
+    Page<Post> findAllByHashtagIdAndVisibilityPublicExcludingBlockedUsers(
+        Long hashtagId, Long currentUserId, Pageable pageable);
+
     long count();
 
     List<Post> findAllByIds(List<Long> postIds);
diff --git a/prothsync/src/main/java/com/prothsync/prothsync/repository/repository/UserRepository.java b/prothsync/src/main/java/com/prothsync/prothsync/repository/repository/UserRepository.java
index d33b650..dfc8c50 100644
--- a/prothsync/src/main/java/com/prothsync/prothsync/repository/repository/UserRepository.java
+++ b/prothsync/src/main/java/com/prothsync/prothsync/repository/repository/UserRepository.java
@@ -26,6 +26,9 @@ List<User> findNearbyUsersByType(double lat, double lng, double radiusKm,
 
     Page<User> searchByNickName(String keyword, Pageable pageable);
 
+    Page<User> searchByNickNameExcludingBlockedUsers(
+        String keyword, Long currentUserId, Pageable pageable);
+
     Page<User> findAll(Pageable pageable);
 
     long count();
diff --git a/prothsync/src/main/java/com/prothsync/prothsync/service/SearchService.java b/prothsync/src/main/java/com/prothsync/prothsync/service/SearchService.java
index fe17559..1c65a35 100644
--- a/prothsync/src/main/java/com/prothsync/prothsync/service/SearchService.java
+++ b/prothsync/src/main/java/com/prothsync/prothsync/service/SearchService.java
@@ -10,7 +10,6 @@
 import com.prothsync.prothsync.exception.PostErrorCode;
 import com.prothsync.prothsync.exception.SearchErrorCode;
 import com.prothsync.prothsync.global.PageResponse;
-import com.prothsync.prothsync.repository.repository.BlockRepository;
 import com.prothsync.prothsync.repository.repository.HashtagRepository;
 import com.prothsync.prothsync.repository.repository.PostRepository;
 import com.prothsync.prothsync.repository.repository.UserRepository;
@@ -33,7 +32,6 @@ public class SearchService {
     private final PostRepository postRepository;
     private final UserRepository userRepository;
     private final PostImageService postImageService;
-    private final BlockRepository blockRepository;
 
     public PageResponse<HashtagResponseDTO> searchHashtags(String keyword, Pageable pageable) {
         validateKeyword(keyword);
@@ -58,22 +56,22 @@ public PageResponse<PostSummaryResponseDTO> searchPostsByHashtag(
         Hashtag hashtag = hashtagRepository.findByTagName(normalizedName)
             .orElseThrow(() -> new BusinessException(PostErrorCode.HASHTAG_NOT_FOUND));
 
-        Page<Post> postPage = postRepository.findAllByHashtagIdAndVisibilityPublic(
-            hashtag.getHashtagId(), pageable);
-
-        List<Long> blockedIds = getBlockedIds(currentUserId);
-
-        List<Post> filteredPosts = postPage.getContent().stream()
-            .filter(post -> !blockedIds.contains(post.getUserId()))
-            .toList();
+        Page<Post> postPage;
+        if (currentUserId != null) {
+            postPage = postRepository.findAllByHashtagIdAndVisibilityPublicExcludingBlockedUsers(
+                hashtag.getHashtagId(), currentUserId, pageable);
+        } else {
+            postPage = postRepository.findAllByHashtagIdAndVisibilityPublic(
+                hashtag.getHashtagId(), pageable);
+        }
 
-        List<Long> postIds = filteredPosts.stream()
+        List<Long> postIds = postPage.getContent().stream()
             .map(Post::getPostId)
             .toList();
 
         Map<Long, String> thumbnailMap = postImageService.getThumbnailUrls(postIds);
 
-        List<PostSummaryResponseDTO> summaries = filteredPosts.stream()
+        List<PostSummaryResponseDTO> summaries = postPage.getContent().stream()
             .map(post -> PostSummaryResponseDTO.of(
                 post, thumbnailMap.get(post.getPostId())))
             .toList();
@@ -81,19 +79,20 @@ public PageResponse<PostSummaryResponseDTO> searchPostsByHashtag(
         return PageResponse.of(summaries, postPage);
     }
 
-
-
     public PageResponse<UserSearchResponseDTO> searchUsers(
         String keyword, Long currentUserId, Pageable pageable) {
 
         validateKeyword(keyword);
 
-        Page<User> userPage = userRepository.searchByNickName(keyword.trim(), pageable);
-
-        List<Long> blockedIds = getBlockedIds(currentUserId);
+        Page<User> userPage;
+        if (currentUserId != null) {
+            userPage = userRepository.searchByNickNameExcludingBlockedUsers(
+                keyword.trim(), currentUserId, pageable);
+        } else {
+            userPage = userRepository.searchByNickName(keyword.trim(), pageable);
+        }
 
         List<UserSearchResponseDTO> users = userPage.getContent().stream()
-            .filter(user -> !blockedIds.contains(user.getUserId()))
             .map(UserSearchResponseDTO::from)
             .toList();
 
@@ -114,11 +113,4 @@ private String normalizeHashtagKeyword(String keyword) {
             .replaceAll("^#+", "")
             .toLowerCase();
     }
-
-    private List<Long> getBlockedIds(Long currentUserId) {
-        if (currentUserId == null) {
-            return List.of();
-        }
-        return blockRepository.findBlockedIdsByBlockerId(currentUserId);
-    }
 }
\ No newline at end of file