diff --git a/web-infrastructure/src/main/resources/mapper/study/StudentMapper.xml b/web-infrastructure/src/main/resources/mapper/study/StudentMapper.xml
index 91eaa55..27e9afa 100644
--- a/web-infrastructure/src/main/resources/mapper/study/StudentMapper.xml
+++ b/web-infrastructure/src/main/resources/mapper/study/StudentMapper.xml
@@ -224,10 +224,10 @@
             </if>
 
             <if test="params.startTime != null and params.startTime!=''">
-                and DATE(c.start_time) <![CDATA[>=]]> #{params.startTime}
+                and DATE(c.start_time) <![CDATA[<=]]> #{params.startTime}
             </if>
             <if test="params.endTime != null and params.endTime!=''">
-                and DATE(c.end_time) <![CDATA[<=]]> #{params.endTime}
+                and DATE(c.end_time) <![CDATA[>=]]> #{params.endTime}
             </if>
             <if test="params.state != null ">
                 <if test="params.state == 0">