diff --git a/sec-api/src/main/java/com/imdroid/secapi/dto/Ehm.java b/sec-api/src/main/java/com/imdroid/secapi/dto/Ehm.java
index d5471a2f..948b7d0d 100644
--- a/sec-api/src/main/java/com/imdroid/secapi/dto/Ehm.java
+++ b/sec-api/src/main/java/com/imdroid/secapi/dto/Ehm.java
@@ -23,6 +23,7 @@ public class Ehm {
     private Short offlinestatdays;
     private Integer offlinecount;
     private Integer offlineminutes;
+    private Integer invalidresultminutes;
     private Integer calcstathours;
     private Float stdeve;
     private Float stdevn;
diff --git a/sec-beidou-ehm/src/main/java/com/imdroid/beidou_ehm/task/EhmTask.java b/sec-beidou-ehm/src/main/java/com/imdroid/beidou_ehm/task/EhmTask.java
index 2728b2f1..2d47ca4e 100644
--- a/sec-beidou-ehm/src/main/java/com/imdroid/beidou_ehm/task/EhmTask.java
+++ b/sec-beidou-ehm/src/main/java/com/imdroid/beidou_ehm/task/EhmTask.java
@@ -61,6 +61,8 @@ public class EhmTask{
 
             // 检查过去N天离线次数和时长
             checkOffline(ehm, status.getState()==GnssStatus.STATE_OFFLINE);
+            // 检查过去N天无效解总时长
+            checkInvalidGnssDataTime(ehm);
             // 计算过去N小时标准差
             // 计算过去N小时有效解比例
             // 计算过去N小时固定解比例
@@ -111,6 +113,37 @@ public class EhmTask{
         }
     }
 
+    private void checkInvalidGnssDataTime(Ehm ehm){
+        LocalDateTime now = ehm.getCreatetime();
+        // 从告警消息里查询离线记录
+        QueryWrapper<WarningMsg> queryWrapper = new QueryWrapper<>();
+        queryWrapper.eq("deviceid",ehm.getDeviceid());
+        queryWrapper.ge("createtime",now.minusDays(ehm.getOfflinestatdays()));
+        queryWrapper.eq("code",WarningCfg.TYPE_CONT_INVALID_RESULT);
+        List<WarningMsg> warningMsgList = warningMsgMapper.selectList(queryWrapper);
+        if(warningMsgList!=null){
+            int invalidGnssDataMinutes = 0;
+            LocalDateTime offlineEnd = null;
+            LocalDateTime offlineBegin = null;
+            for(WarningMsg warningMsg:warningMsgList){
+                // 读下一条纪录时才计算上一条的时间差，因为cleartime有可能没有
+                if(offlineEnd==null) offlineEnd=warningMsg.getCreatetime();
+                if(offlineBegin!=null){
+                    Duration duration = Duration.between(offlineBegin,offlineEnd);
+                    invalidGnssDataMinutes+=duration.toMinutes();
+                }
+                offlineBegin = warningMsg.getCreatetime();
+                offlineEnd = warningMsg.getCleartime();
+            }
+            if(offlineEnd==null) offlineEnd=now;
+            if(offlineBegin!=null){
+                Duration duration = Duration.between(offlineBegin,offlineEnd);
+                invalidGnssDataMinutes+=duration.toMinutes();
+            }
+            ehm.setInvalidresultminutes(invalidGnssDataMinutes);
+        }
+    }
+
     private void checkCalcResults(Ehm ehm){
         // 获取过去N小时的解算数据
         QueryWrapper<GnssCalcData> queryWrapper = new QueryWrapper<>();
diff --git a/sec-beidou/src/main/java/com/imdroid/beidou/controller/GnssEhmController.java b/sec-beidou/src/main/java/com/imdroid/beidou/controller/GnssEhmController.java
index 0ed4abc7..97fdae8e 100644
--- a/sec-beidou/src/main/java/com/imdroid/beidou/controller/GnssEhmController.java
+++ b/sec-beidou/src/main/java/com/imdroid/beidou/controller/GnssEhmController.java
@@ -42,6 +42,7 @@ public class GnssEhmController extends BasicController implements CommonExcelSer
         if(sortItems.size()==0) {
            sortItems.add("离线次数");sortSqls.add("order by offlinecount desc");
            sortItems.add("离线时长");sortSqls.add("order by offlineminutes desc");
+           sortItems.add("连续无效解时长");sortSqls.add("order by invalidresultminutes desc");
            sortItems.add("东标准差");sortSqls.add("order by stdeve desc");
            sortItems.add("北标准差");sortSqls.add("order by stdevn desc");
            sortItems.add("天标准差");sortSqls.add("order by stdevu desc");
diff --git a/sec-beidou/src/main/resources/db/schema.sql b/sec-beidou/src/main/resources/db/schema.sql
index 60d020fe..50381969 100644
--- a/sec-beidou/src/main/resources/db/schema.sql
+++ b/sec-beidou/src/main/resources/db/schema.sql
@@ -377,6 +377,7 @@ CREATE TABLE IF NOT EXISTS `ehm` (
     `offlinestatdays` smallint DEFAULT NULL COMMENT '离线统计周期',
     `offlinecount` int DEFAULT NULL COMMENT '离线统计周期内的离线次数',
     `offlineminutes` int DEFAULT NULL COMMENT '离线统计周期内的离线时长',
+    `invalidresultminutes` int DEFAULT NULL COMMENT '离线统计周期内的连续无效解时长',
     `calcstathours` int DEFAULT NULL COMMENT '数据分析周期',
     `stdeve` float DEFAULT NULL COMMENT '标准差',
     `stdevn` float DEFAULT NULL COMMENT '标准差',
diff --git a/sec-beidou/src/main/resources/templates/page/gnss_ehm.html b/sec-beidou/src/main/resources/templates/page/gnss_ehm.html
index 3095d0b6..c175b96f 100644
--- a/sec-beidou/src/main/resources/templates/page/gnss_ehm.html
+++ b/sec-beidou/src/main/resources/templates/page/gnss_ehm.html
@@ -80,6 +80,7 @@
             {field: 'calcstathours', title: '数据分析周期(小时)'},
             {field: 'offlinecount', title: '离线次数'},
             {field: 'offlineminutes', title: '离线分钟数'},
+            {field: 'invalidresultminutes', title: '连续无效解分钟数'},
             {field: 'stdeve', title: '东标准差'},
             {field: 'stdevn', title: '北标准差'},
             {field: 'stdevu', title: '天标准差'},