diff --git a/pjcloud-canteen/pjcloud-canteen-biz/src/main/java/com/bsd/pjcloud/canteen/util/MchJobTimeMealSegmentUtils.java b/pjcloud-canteen/pjcloud-canteen-biz/src/main/java/com/bsd/pjcloud/canteen/util/MchJobTimeMealSegmentUtils.java
index 4538c7292..04a831142 100644
--- a/pjcloud-canteen/pjcloud-canteen-biz/src/main/java/com/bsd/pjcloud/canteen/util/MchJobTimeMealSegmentUtils.java
+++ b/pjcloud-canteen/pjcloud-canteen-biz/src/main/java/com/bsd/pjcloud/canteen/util/MchJobTimeMealSegmentUtils.java
@@ -25,7 +25,10 @@ public final class MchJobTimeMealSegmentUtils {
             .optionalEnd()
             .toFormatter();
 
-    private static final String[] DEFAULT_SEGMENT_NAMES = {"早餐", "午餐", "晚餐"};
+    /** 按时段开始时刻划分：<10 早餐，<15 午餐，<21 晚餐，否则宵夜 */
+    private static final LocalTime BREAKFAST_END = LocalTime.of(10, 0);
+    private static final LocalTime LUNCH_END = LocalTime.of(15, 0);
+    private static final LocalTime DINNER_END = LocalTime.of(21, 0);
 
     private MchJobTimeMealSegmentUtils() {
     }
@@ -36,13 +39,14 @@ public final class MchJobTimeMealSegmentUtils {
 
     public static List<OrderingFoodMealSegmentVO> parseMealSegments(String jobTime) {
         List<OrderingFoodMealSegmentVO> out = new ArrayList<>();
-        List<TimeRange> merged = mergeJobTimeIntervals(jobTime);
-        for (int i = 0; i < merged.size(); i++) {
-            TimeRange r = merged.get(i);
+        List<TimeRange> intervals = parseRawIntervals(jobTime);
+        for (int i = 0; i < intervals.size(); i++) {
+            TimeRange r = intervals.get(i);
+            int mealType = resolveMealTypeByStart(r.start);
             OrderingFoodMealSegmentVO vo = new OrderingFoodMealSegmentVO();
             vo.setSegmentIndex(i);
-            vo.setMealSegmentType(resolveMealType(i));
-            vo.setMealSegmentName(resolveMealName(i));
+            vo.setMealSegmentType(mealType);
+            vo.setMealSegmentName(resolveMealNameByType(mealType));
             vo.setStartTime(r.start.format(HM));
             vo.setEndTime(r.end.format(HM));
             out.add(vo);
@@ -65,21 +69,36 @@ public final class MchJobTimeMealSegmentUtils {
         return findSegment(jobTime, segmentIndex) != null;
     }
 
-    private static int resolveMealType(int index) {
-        if (index >= 0 && index < DEFAULT_SEGMENT_NAMES.length) {
-            return index + 1;
+    /**
+     * 根据时段开始时间推断餐段（支持早餐留空如 {@code ,11:00-12:00,17:00-18:00}）。
+     */
+    private static int resolveMealTypeByStart(LocalTime start) {
+        if (start == null) {
+            return 99;
         }
-        return 99;
+        if (start.isBefore(BREAKFAST_END)) {
+            return 1;
+        }
+        if (start.isBefore(LUNCH_END)) {
+            return 2;
+        }
+        if (start.isBefore(DINNER_END)) {
+            return 3;
+        }
+        return 4;
     }
 
-    private static String resolveMealName(int index) {
-        if (index >= 0 && index < DEFAULT_SEGMENT_NAMES.length) {
-            return DEFAULT_SEGMENT_NAMES[index];
-        }
-        return "时段" + (index + 1);
+    private static String resolveMealNameByType(int mealType) {
+        return switch (mealType) {
+            case 1 -> "早餐";
+            case 2 -> "午餐";
+            case 3 -> "晚餐";
+            case 4 -> "宵夜";
+            default -> "时段";
+        };
     }
 
-    private static List<TimeRange> mergeJobTimeIntervals(String jobTime) {
+    private static List<TimeRange> parseRawIntervals(String jobTime) {
         List<TimeRange> raw = new ArrayList<>();
         if (isBlankJobTime(jobTime)) {
             return raw;
@@ -100,25 +119,8 @@ public final class MchJobTimeMealSegmentUtils {
             }
             raw.add(new TimeRange(a, b));
         }
-        if (raw.isEmpty()) {
-            return raw;
-        }
         raw.sort(Comparator.comparing(r -> r.start));
-        List<TimeRange> merged = new ArrayList<>();
-        TimeRange cur = raw.get(0);
-        for (int i = 1; i < raw.size(); i++) {
-            TimeRange next = raw.get(i);
-            if (!next.start.isAfter(cur.end)) {
-                if (next.end.isAfter(cur.end)) {
-                    cur = new TimeRange(cur.start, next.end);
-                }
-            } else {
-                merged.add(cur);
-                cur = next;
-            }
-        }
-        merged.add(cur);
-        return merged;
+        return raw;
     }
 
     private static LocalTime parseHm(String s) {