diff --git a/src/main/resources/mapper/TBasicMapper.xml b/src/main/resources/mapper/TBasicMapper.xml
index 18b7a9d..fa87137 100644
--- a/src/main/resources/mapper/TBasicMapper.xml
+++ b/src/main/resources/mapper/TBasicMapper.xml
@@ -104,7 +104,9 @@
                 `is_other`=#{tBasic.isOther},
             </if>
             b_column5=CONCAT(inpatient_no,'_',admiss_times),
-            `dis_date`=#{tBasic.disDate},
+            <if test="tBasic.disDate !=null ">
+                `dis_date`=#{tBasic.disDate},
+            </if>
             `update_time`=now()
         </set>
         WHERE `patient_id`=#{tBasic.patientId,jdbcType=VARCHAR};