diff --git a/src/main/java/com/spring/modules/quote/service/impl/QuoteDetailBomTreeServiceImpl.java b/src/main/java/com/spring/modules/quote/service/impl/QuoteDetailBomTreeServiceImpl.java
index 326f0adc..f91e48b1 100644
--- a/src/main/java/com/spring/modules/quote/service/impl/QuoteDetailBomTreeServiceImpl.java
+++ b/src/main/java/com/spring/modules/quote/service/impl/QuoteDetailBomTreeServiceImpl.java
@@ -94,6 +94,18 @@ public class QuoteDetailBomTreeServiceImpl extends ServiceImpl<QuoteDetailBomTre
         List<BomNodeData> children = new ArrayList<>();
     }
 
+    /**
+     * 物料成本查询结果：
+     * SUCCESS - 首次（池化连接）查询成功；
+     * SUCCESS_AFTER_RECONNECT - 首次失败，重试时切换新连接后成功；
+     * FAILED - 重试后仍失败（按现有逻辑置 0，不阻断后续流程）。
+     */
+    private enum CostQueryResult {
+        SUCCESS,
+        SUCCESS_AFTER_RECONNECT,
+        FAILED
+    }
+
     // =========================================================================
     // 公开方法：两阶段执行
     // =========================================================================
@@ -277,15 +289,27 @@ public class QuoteDetailBomTreeServiceImpl extends ServiceImpl<QuoteDetailBomTre
             List<CompletableFuture<Void>> futures = needCostComponents.stream()
                     .map(component -> CompletableFuture.runAsync(() -> {
                         Server conn = null;
+                        CostQueryResult costQueryResult = CostQueryResult.FAILED;
                         try {
                             conn = connectionPool.take();
-                            getFinalPartCost(component, conn, costCache);
+                            costQueryResult = getFinalPartCost(component, conn, ifsConFactory, costCache);
                         } catch (InterruptedException e) {
                             Thread.currentThread().interrupt();
                             log.warn("[BOM_PROCESS] 并行成本查询线程被中断 - PartNo: {}", component.getComponentPart());
                         } finally {
                             if (conn != null) {
-                                connectionPool.offer(conn);
+                                if (costQueryResult == CostQueryResult.SUCCESS) {
+                                    connectionPool.offer(conn);
+                                } else {
+                                    // 连接在本次查询中出现异常迹象（或最终失败），替换为新连接，避免“坏连接”反复影响后续组件
+                                    try {
+                                        connectionPool.offer(ifsConFactory.get());
+                                    } catch (Exception ex) {
+                                        log.warn("[BOM_PROCESS] IFS连接替换失败，回退复用原连接 - PartNo: {}, Error: {}",
+                                                component.getComponentPart(), ex.getMessage());
+                                        connectionPool.offer(conn);
+                                    }
+                                }
                             }
                         }
                     }, IFS_COST_EXECUTOR))
@@ -825,7 +849,10 @@ public class QuoteDetailBomTreeServiceImpl extends ServiceImpl<QuoteDetailBomTre
     /**
      * 获取物料成本（带重试机制）
      */
-    private void getFinalPartCost(QuoteDetailBom component, Server ifsServer, Map<String, BigDecimal> costCache) {
+    private CostQueryResult getFinalPartCost(QuoteDetailBom component,
+                                             Server ifsServer,
+                                             Supplier<Server> ifsConFactory,
+                                             Map<String, BigDecimal> costCache) {
         final int MAX_RETRY_COUNT = 2;
         final long RETRY_INTERVAL_MS = 500;
 
@@ -839,7 +866,7 @@ public class QuoteDetailBomTreeServiceImpl extends ServiceImpl<QuoteDetailBomTre
             component.setActualPrice(cachedCost);
             component.setQuotePrice(cachedCost);
             log.info("[COST_QUERY] 从缓存读取成功 - PartNo: {}, Site: {}, UnitCost: {}", partNo, site, cachedCost);
-            return;
+            return CostQueryResult.SUCCESS;
         }
 
         log.info("[COST_QUERY] 开始查询物料成本 - PartNo: {}, Site: {}", partNo, site);
@@ -855,8 +882,9 @@ public class QuoteDetailBomTreeServiceImpl extends ServiceImpl<QuoteDetailBomTre
         for (int retryCount = 1; retryCount <= MAX_RETRY_COUNT; retryCount++) {
             try {
                 log.debug("[COST_QUERY] 第 {} 次尝试查询 - PartNo: {}", retryCount, partNo);
-
-                map = baseSearchBean.getInventoryValueByPartNo(ifsServer, part);
+                // 首次查询使用连接池分配的连接；重试使用新连接，提升偶发连接态异常下的成功率
+                Server currentIfsServer = retryCount == 1 ? ifsServer : ifsConFactory.get();
+                map = baseSearchBean.getInventoryValueByPartNo(currentIfsServer, part);
 
                 if (Objects.equals(map.get("resultCode"), "200")) {
                     InventoryPartUnitCostSumVo unitCostSumVo = JSONObject.parseObject(map.get("obj"), InventoryPartUnitCostSumVo.class);
@@ -869,7 +897,7 @@ public class QuoteDetailBomTreeServiceImpl extends ServiceImpl<QuoteDetailBomTre
                     log.info("[COST_QUERY] 查询成功 - PartNo: {}, Site: {}, UnitCost: {}, 尝试次数: {}",
                             partNo, site, unitCost, retryCount);
                     success = true;
-                    break;
+                    return retryCount == 1 ? CostQueryResult.SUCCESS : CostQueryResult.SUCCESS_AFTER_RECONNECT;
                 } else {
                     lastErrorMsg = map.get("resultMsg");
                     log.warn("[COST_QUERY] 第 {} 次查询失败 - PartNo: {}, Site: {}, ResultCode: {}, ErrorMsg: {}",
@@ -923,6 +951,7 @@ public class QuoteDetailBomTreeServiceImpl extends ServiceImpl<QuoteDetailBomTre
             component.setQuotePrice(BigDecimal.ZERO);
             costCache.put(cacheKey, BigDecimal.ZERO);
         }
+        return CostQueryResult.FAILED;
     }
 
     private QuoteDetailBomTree isComponentBom(QuoteDetail component) {