diff --git a/src/main/java/com/ycwl/basic/puzzle/controller/PuzzleTemplateController.java b/src/main/java/com/ycwl/basic/puzzle/controller/PuzzleTemplateController.java
index 0538b72d..5628baad 100644
--- a/src/main/java/com/ycwl/basic/puzzle/controller/PuzzleTemplateController.java
+++ b/src/main/java/com/ycwl/basic/puzzle/controller/PuzzleTemplateController.java
@@ -118,6 +118,17 @@ public class PuzzleTemplateController {
         return ApiResponse.success(null);
     }
 
+    /**
+     * 批量替换模板元素（删除旧元素，添加新元素）
+     */
+    @PutMapping("/templates/{templateId}/elements")
+    public ApiResponse<Void> replaceElements(@PathVariable Long templateId,
+                                             @RequestBody List<ElementCreateRequest> elements) {
+        log.info("批量替换元素请求: templateId={}, count={}", templateId, elements.size());
+        templateService.replaceElements(templateId, elements);
+        return ApiResponse.success(null);
+    }
+
     /**
      * 更新元素
      */
diff --git a/src/main/java/com/ycwl/basic/puzzle/mapper/PuzzleElementMapper.java b/src/main/java/com/ycwl/basic/puzzle/mapper/PuzzleElementMapper.java
index fcda3ad7..cd962218 100644
--- a/src/main/java/com/ycwl/basic/puzzle/mapper/PuzzleElementMapper.java
+++ b/src/main/java/com/ycwl/basic/puzzle/mapper/PuzzleElementMapper.java
@@ -23,6 +23,12 @@ public interface PuzzleElementMapper {
      */
     List<PuzzleElementEntity> getByTemplateId(@Param("templateId") Long templateId);
 
+    /**
+     * 根据模板ID和元素Key查询元素
+     */
+    PuzzleElementEntity getByTemplateIdAndKey(@Param("templateId") Long templateId,
+                                              @Param("elementKey") String elementKey);
+
     /**
      * 插入元素
      */
diff --git a/src/main/java/com/ycwl/basic/puzzle/service/IPuzzleTemplateService.java b/src/main/java/com/ycwl/basic/puzzle/service/IPuzzleTemplateService.java
index 3b695cdc..5e9d96bf 100644
--- a/src/main/java/com/ycwl/basic/puzzle/service/IPuzzleTemplateService.java
+++ b/src/main/java/com/ycwl/basic/puzzle/service/IPuzzleTemplateService.java
@@ -69,6 +69,14 @@ public interface IPuzzleTemplateService {
      */
     void batchAddElements(Long templateId, List<ElementCreateRequest> elements);
 
+    /**
+     * 批量替换元素（删除旧元素，添加新元素）
+     *
+     * @param templateId 模板ID
+     * @param elements   新的元素列表
+     */
+    void replaceElements(Long templateId, List<ElementCreateRequest> elements);
+
     /**
      * 更新元素
      */
diff --git a/src/main/java/com/ycwl/basic/puzzle/service/impl/PuzzleTemplateServiceImpl.java b/src/main/java/com/ycwl/basic/puzzle/service/impl/PuzzleTemplateServiceImpl.java
index f01d8509..8b11dfc2 100644
--- a/src/main/java/com/ycwl/basic/puzzle/service/impl/PuzzleTemplateServiceImpl.java
+++ b/src/main/java/com/ycwl/basic/puzzle/service/impl/PuzzleTemplateServiceImpl.java
@@ -20,6 +20,8 @@ import org.springframework.transaction.annotation.Transactional;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
+import java.util.Set;
 import java.util.stream.Collectors;
 
 /**
@@ -227,6 +229,72 @@ public class PuzzleTemplateServiceImpl implements IPuzzleTemplateService {
         }
     }
 
+    @Override
+    @Transactional(rollbackFor = Exception.class)
+    public void replaceElements(Long templateId, List<ElementCreateRequest> elements) {
+        log.info("批量替换元素: templateId={}, count={}", templateId, elements.size());
+
+        // 1. 校验模板
+        PuzzleTemplateEntity template = templateMapper.getById(templateId);
+        if (template == null) {
+            throw new IllegalArgumentException("模板不存在: " + templateId);
+        }
+
+        // 2. 获取现有元素（建立 elementKey -> Entity 的映射）
+        List<PuzzleElementEntity> existingElements = elementMapper.getByTemplateId(templateId);
+        Map<String, PuzzleElementEntity> existingMap = existingElements.stream()
+                .collect(Collectors.toMap(
+                    PuzzleElementEntity::getElementKey,
+                    entity -> entity,
+                    (e1, e2) -> e1  // 如果有重复key，保留第一个
+                ));
+
+        // 3. 构建新元素的 key 集合
+        Set<String> newElementKeys = elements.stream()
+                .map(ElementCreateRequest::getElementKey)
+                .collect(Collectors.toSet());
+
+        // 4. 找出需要删除的元素（旧元素中不在新元素列表中的）
+        List<Long> toDeleteIds = existingElements.stream()
+                .filter(entity -> !newElementKeys.contains(entity.getElementKey()))
+                .map(PuzzleElementEntity::getId)
+                .collect(Collectors.toList());
+
+        // 5. 删除不需要的元素
+        int deletedCount = 0;
+        for (Long id : toDeleteIds) {
+            elementMapper.deleteById(id);
+            deletedCount++;
+        }
+        log.info("删除不需要的元素: templateId={}, count={}", templateId, deletedCount);
+
+        // 6. 处理新元素列表：更新或插入
+        int updatedCount = 0;
+        int insertedCount = 0;
+        for (ElementCreateRequest request : elements) {
+            request.setTemplateId(templateId);
+            ElementConfigHelper.validateRequest(request);
+
+            PuzzleElementEntity existingEntity = existingMap.get(request.getElementKey());
+            if (existingEntity != null) {
+                // 更新现有元素
+                PuzzleElementEntity entity = ElementConfigHelper.toEntity(request);
+                entity.setId(existingEntity.getId());
+                elementMapper.update(entity);
+                updatedCount++;
+            } else {
+                // 插入新元素
+                PuzzleElementEntity entity = ElementConfigHelper.toEntity(request);
+                entity.setDeleted(0);
+                elementMapper.insert(entity);
+                insertedCount++;
+            }
+        }
+
+        log.info("批量替换元素完成: templateId={}, deleted={}, updated={}, inserted={}",
+            templateId, deletedCount, updatedCount, insertedCount);
+    }
+
     @Override
     @Transactional(rollbackFor = Exception.class)
     public void updateElement(Long id, ElementCreateRequest request) {
diff --git a/src/main/resources/mapper/PuzzleElementMapper.xml b/src/main/resources/mapper/PuzzleElementMapper.xml
index 42f7b16a..d8ad9df1 100644
--- a/src/main/resources/mapper/PuzzleElementMapper.xml
+++ b/src/main/resources/mapper/PuzzleElementMapper.xml
@@ -49,6 +49,14 @@
         ORDER BY z_index ASC, id ASC
     </select>
 
+    <!-- 根据模板ID和元素Key查询元素 -->
+    <select id="getByTemplateIdAndKey" resultMap="BaseResultMap">
+        SELECT <include refid="Base_Column_List"/>
+        FROM puzzle_element
+        WHERE template_id = #{templateId} AND element_key = #{elementKey} AND deleted = 0
+        LIMIT 1
+    </select>
+
     <!-- 插入（重构版） -->
     <insert id="insert" parameterType="com.ycwl.basic.puzzle.entity.PuzzleElementEntity"
             useGeneratedKeys="true" keyProperty="id">