diff --git a/platform-operate-api/src/main/java/com/lyms/platform/operate/web/service/impl/PatientWeightServiceImpl.java b/platform-operate-api/src/main/java/com/lyms/platform/operate/web/service/impl/PatientWeightServiceImpl.java
index 48e396d..2981c89 100644
--- a/platform-operate-api/src/main/java/com/lyms/platform/operate/web/service/impl/PatientWeightServiceImpl.java
+++ b/platform-operate-api/src/main/java/com/lyms/platform/operate/web/service/impl/PatientWeightServiceImpl.java
@@ -512,7 +512,9 @@ public class PatientWeightServiceImpl extends BaseServiceImpl implements Patient
 
             patientWeight.setDayWeights2(dayWeights2);
             patientWeight.setDayWeights(dayWeights);
-            patientWeight.setBmi(getBmi(beforeWeight, beforeHeight));
+            if(StringUtils.isNotEmpty(beforeWeight) && StringUtils.isNotEmpty(beforeHeight)) {
+                patientWeight.setBmi(getBmi(beforeWeight, beforeHeight));
+            }
         }
         patientWeightService2.update(Query.query(Criteria.where("id").is(id)), patientWeight);