diff --git a/src/main/java/com/labelsys/backend/dto/response/AgentConfigInfoResponse.java b/src/main/java/com/labelsys/backend/dto/response/AgentConfigInfoResponse.java
index bec04bf..b5b6432 100644
--- a/src/main/java/com/labelsys/backend/dto/response/AgentConfigInfoResponse.java
+++ b/src/main/java/com/labelsys/backend/dto/response/AgentConfigInfoResponse.java
@@ -4,6 +4,8 @@ import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.Builder;
 import lombok.Data;
 
+import java.time.LocalDateTime;
+
 @Schema(description = "Agent配置信息响应")
 @Data
 @Builder
@@ -22,7 +24,7 @@ public class AgentConfigInfoResponse {
     private PromptConfigInfo promptConfig;
 
     @Schema(description = "创建时间")
-    private java.time.LocalDateTime createdAt;
+    private LocalDateTime createdAt;
 
     @Data
     @Builder
diff --git a/src/main/java/com/labelsys/backend/service/SysConfigService.java b/src/main/java/com/labelsys/backend/service/SysConfigService.java
index 7717cbb..4a399f2 100644
--- a/src/main/java/com/labelsys/backend/service/SysConfigService.java
+++ b/src/main/java/com/labelsys/backend/service/SysConfigService.java
@@ -13,8 +13,10 @@ import com.labelsys.backend.dto.request.SaveSysConfigRequest;
 import com.labelsys.backend.dto.request.SysConfigPageQuery;
 import com.labelsys.backend.dto.request.UpdateSysConfigRequest;
 import com.labelsys.backend.dto.response.SysConfigResponse;
+import com.labelsys.backend.entity.AnnotationAgentConfig;
 import com.labelsys.backend.entity.SysConfig;
 import com.labelsys.backend.enums.ConfigType;
+import com.labelsys.backend.mapper.AnnotationAgentConfigMapper;
 import com.labelsys.backend.mapper.SysConfigMapper;
 import com.labelsys.backend.util.IdGenerator;
 import com.labelsys.backend.util.SM4Util;
@@ -24,6 +26,7 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.StringUtils;
 
+import java.time.LocalDateTime;
 import java.util.List;
 
 @Slf4j
@@ -31,7 +34,8 @@ import java.util.List;
 @RequiredArgsConstructor
 public class SysConfigService {
 
-    private final SysConfigMapper sysConfigMapper;
+    private final SysConfigMapper             sysConfigMapper;
+    private final AnnotationAgentConfigMapper agentConfigMapper;
     //private final DataPermissionService dataPermissionService;
 
     @Transactional
@@ -80,6 +84,9 @@ public class SysConfigService {
             // 1. 检查配置是否存在
             SysConfig existing = getConfigEntity(currentUser, configId);
 
+            // 记录原始配置类型，用于后续判断是否需要同步更新agentconfigs
+            String originalConfigType = existing.getConfigType();
+
             // 2. 如果要更新configName，需要校验新名称是否与同一公司下其他配置冲突
             if (StringUtils.hasText(request.configName()) && !request.configName().equals(existing.getConfigName())) {
                 // 检查新名称是否已被同一公司的其他配置使用
@@ -109,6 +116,10 @@ public class SysConfigService {
             sysConfigMapper.updateById(existing);
             log.info("updated sys config, companyId={}, userId={}, configId={}",
                     currentUser.companyId(), currentUser.userId(), configId);
+
+            // 3. 同步更新annotation_agent_configs表中对应的配置
+            syncUpdateAgentConfigs(currentUser.companyId(), configId, existing);
+
             return existing;
         } catch (BusinessException e) {
             throw e;
@@ -289,4 +300,76 @@ public class SysConfigService {
 
         return sysConfigMapper.selectList(wrapper);
     }
+
+    /**
+     * 同步更新annotation_agent_configs表中对应的配置
+     *
+     * @param companyId 公司ID
+     * @param configId  系统配置ID
+     * @param config    更新后的系统配置
+     */
+    private void syncUpdateAgentConfigs(Long companyId, Long configId, SysConfig config) {
+        try {
+            if (ConfigType.MODEL.name().equalsIgnoreCase(config.getConfigType())) {
+                // 更新所有使用该模型配置的agent配置
+                LambdaQueryWrapper<AnnotationAgentConfig> modelWrapper =
+                        new LambdaQueryWrapper<>();
+                modelWrapper.eq(AnnotationAgentConfig::getCompanyId, companyId)
+                        .eq(AnnotationAgentConfig::getModelConfigId, configId);
+
+                List<AnnotationAgentConfig> modelAgentConfigs =
+                        agentConfigMapper.selectList(modelWrapper);
+
+                // 先解密获取原始API密钥，再通过setModelApiKey加密存储
+                String decryptedApiKey = null;
+                String modelUrl = null;
+                String llmType = null;
+                try {
+                    ObjectMapper objectMapper = new ObjectMapper();
+                    LlmConfigModel llmConfig = objectMapper.readValue(config.getConfigValue(), LlmConfigModel.class);
+                    if (llmConfig != null) {
+                        modelUrl = llmConfig.getModelUrl();
+                        llmType = llmConfig.getLlmType();
+                        // 解密API密钥，setModelApiKey会再次加密
+                        if (llmConfig.getApiKey() != null) {
+                            decryptedApiKey = SM4Util.decryptSafe(llmConfig.getApiKey());
+                        }
+                    }
+                } catch (Exception e) {
+                    log.warn("解析模型配置值失败，configId={}, error={}", configId, e.getMessage());
+                }
+
+                for (AnnotationAgentConfig agentConfig : modelAgentConfigs) {
+                    agentConfig.setModelName(config.getConfigName());
+                    agentConfig.setModelUrl(modelUrl);
+                    agentConfig.setModelApiKey(decryptedApiKey);  // setModelApiKey会加密存储
+                    agentConfig.setLlmType(llmType);
+                    agentConfig.setCreatedAt(LocalDateTime.now());
+                    agentConfigMapper.updateById(agentConfig);
+                }
+
+                log.info("sync updated {} agent configs with modelConfigId={}", modelAgentConfigs.size(), configId);
+            } else if (ConfigType.PROMPT.name().equalsIgnoreCase(config.getConfigType())) {
+                // 更新所有使用该提示词配置的agent配置
+                LambdaQueryWrapper<AnnotationAgentConfig> promptWrapper =
+                        new LambdaQueryWrapper<>();
+                promptWrapper.eq(AnnotationAgentConfig::getCompanyId, companyId)
+                        .eq(AnnotationAgentConfig::getPromptConfigId, configId);
+
+                List<AnnotationAgentConfig> promptAgentConfigs =
+                        agentConfigMapper.selectList(promptWrapper);
+
+                for (AnnotationAgentConfig agentConfig : promptAgentConfigs) {
+                    agentConfig.setPromptText(config.getConfigValue());
+                    agentConfig.setCreatedAt(LocalDateTime.now());
+                    agentConfigMapper.updateById(agentConfig);
+                }
+
+                log.info("sync updated {} agent configs with promptConfigId={}", promptAgentConfigs.size(), configId);
+            }
+        } catch (Exception e) {
+            log.error("syncUpdateAgentConfigs failed, configId={}, error={}", configId, e.getMessage(), e);
+            throw e;
+        }
+    }
 }
\ No newline at end of file