diff --git a/src/main/java/com/xujie/sys/modules/sampletracking/service/impl/SampleProofTrackingServiceImpl.java b/src/main/java/com/xujie/sys/modules/sampletracking/service/impl/SampleProofTrackingServiceImpl.java
index 3ae88b00..49312dfc 100644
--- a/src/main/java/com/xujie/sys/modules/sampletracking/service/impl/SampleProofTrackingServiceImpl.java
+++ b/src/main/java/com/xujie/sys/modules/sampletracking/service/impl/SampleProofTrackingServiceImpl.java
@@ -459,16 +459,28 @@ public class SampleProofTrackingServiceImpl implements SampleProofTrackingServic
         if (isTrackingProofingCompleted(rowData.getProofingStatus())) {
             return "Complete";
         }
-        String requiredDeliveryDate = toDateString(rowData.getRequiredDeliveryDate());
-        if (isBlank(requiredDeliveryDate)) {
+        String packageDate = resolveTrackingPackageDateForExport(rowData);
+        String baseline = toDateString(rowData.getBaseline());
+        if (isBlank(packageDate) || isBlank(baseline)) {
             return "";
         }
-        String today = toDateString(new Date());
-        String statusPrefix = today.compareTo(requiredDeliveryDate) <= 0 ? "On schedule" : "Delay";
+        // Delay 按 Delivery&Package 相对原计划判定：package 晚于 baseline 即延期，
+        // 不再用“今天 vs 预计完成日期”，避免计划已改期后仍显示 On schedule。
+        String statusPrefix = packageDate.compareTo(baseline) > 0 ? "Delay" : "On schedule";
         String pendingProcessLabel = getFirstPendingProcessLabelForExport(rowData, processColumns, selectedBuNo, buProcessConfigMap);
         return statusPrefix + "-" + pendingProcessLabel;
     }
 
+    private String resolveTrackingPackageDateForExport(ProofTrackingData rowData) {
+        String packageDate = toDateString(rowData == null ? null : rowData.getRequiredDeliveryDate());
+        if (!isBlank(packageDate)) {
+            return packageDate;
+        }
+        // required_delivery_date 与 Delivery&Package 工序日期同一口径，主字段缺失时回退工序实际日期。
+        ProofTrackingProcessValueData processValue = resolveProcessValueByCode(rowData, DELIVERY_PACKAGE_PROCESS_CODE);
+        return toDateString(processValue == null ? null : processValue.getActualDate());
+    }
+
     private String getFirstPendingProcessLabelForExport(ProofTrackingData rowData,
                                                         List<ProofTrackingProcessColumnData> processColumns,
                                                         String selectedBuNo,