diff --git a/frontend/src/components/dialog/manage-members-dialog.js b/frontend/src/components/dialog/manage-members-dialog.js
index 3885013b3d..0bbddd761a 100644
--- a/frontend/src/components/dialog/manage-members-dialog.js
+++ b/frontend/src/components/dialog/manage-members-dialog.js
@@ -1,6 +1,6 @@
 import React, { Fragment } from 'react';
 import PropTypes from 'prop-types';
-import { Button, Modal, ModalHeader, ModalBody, ModalFooter, Table } from 'reactstrap';
+import { Button, Modal, ModalHeader, ModalBody, ModalFooter, Table, Input, Label, FormGroup } from 'reactstrap';
 import { Utils } from '../../utils/utils';
 import { gettext } from '../../utils/constants';
 import { seafileAPI } from '../../utils/seafile-api';
@@ -31,7 +31,8 @@ class ManageMembersDialog extends React.Component {
       hasNextPage: false,
       selectedOption: null,
       errMessage: [],
-      isItemFreezed: false
+      isItemFreezed: false,
+      searchGroupMemberInputValue: '',
     };
   }
 
@@ -49,7 +50,7 @@ class ManageMembersDialog extends React.Component {
         isLoadingMore: false,
         page: page,
         hasNextPage: members.length < perPage ? false : true,
-        groupMembers: groupMembers.concat(members) 
+        groupMembers: groupMembers.concat(members)
       });
     }).catch(error => {
       let errMessage = Utils.getErrorMsg(error);
@@ -92,6 +93,24 @@ class ManageMembersDialog extends React.Component {
     });
   }
 
+  handleSearchGroupMemberInputChange = (e) => {
+    this.setState({
+      searchGroupMemberInputValue: e.target.value
+    });
+  }
+
+  searchGroupMember = () => {
+
+    seafileAPI.searchGroupMember(this.props.groupID, this.state.searchGroupMemberInputValue).then((res) => {
+      this.setState({
+        groupMembers: res.data,
+      });
+    }).catch(error => {
+      let errMessage = Utils.getErrorMsg(error);
+      toaster.danger(errMessage);
+    });
+  }
+
   toggleItemFreezed = (isFreezed) => {
     this.setState({
       isItemFreezed: isFreezed
@@ -112,10 +131,10 @@ class ManageMembersDialog extends React.Component {
       const isBottom = (clientHeight + scrollTop + 1 >= scrollHeight);
       if (isBottom) { // scroll to the bottom
         this.setState({isLoadingMore: true}, () => {
-          this.listGroupMembers(page + 1); 
-        }); 
-      }   
-    }   
+          this.listGroupMembers(page + 1);
+        });
+      }
+    }
   }
 
   changeMember = (targetMember) => {
@@ -143,20 +162,39 @@ class ManageMembersDialog extends React.Component {
       <Modal isOpen={true} toggle={this.toggle}>
         <ModalHeader toggle={this.toggle}>{gettext('Manage group members')}</ModalHeader>
         <ModalBody>
-          <p>{gettext('Add group member')}</p>
-          <div className='add-members'>
-            <UserSelect
-              placeholder={gettext('Search users...')}
-              onSelectChange={this.onSelectChange}
-              ref="userSelect"
-              isMulti={true}
-              className="add-members-select"
-            />
-            {this.state.selectedOption ?
-              <Button color="secondary" onClick={this.addGroupMember}>{gettext('Submit')}</Button> :
-              <Button color="secondary" disabled>{gettext('Submit')}</Button>
-            }
-          </div>
+          <FormGroup>
+            <p>{gettext('Add group member')}</p>
+            <div className='add-members'>
+              <UserSelect
+                placeholder={gettext('Search users...')}
+                onSelectChange={this.onSelectChange}
+                ref="userSelect"
+                isMulti={true}
+                className="add-members-select"
+              />
+              {this.state.selectedOption ?
+                <Button color="secondary" onClick={this.addGroupMember}>{gettext('Submit')}</Button> :
+                <Button color="secondary" disabled>{gettext('Submit')}</Button>
+              }
+            </div>
+          </FormGroup>
+          <FormGroup>
+            <p>{gettext('Search group member')}</p>
+            <div className="search-members">
+              <Input
+                type="text"
+                id="search-member"
+                className="form-control search-members-input"
+                value={this.state.searchGroupMemberInputValue}
+                onChange={this.handleSearchGroupMemberInputChange}
+                placeholder={gettext('Search users...')}
+              />
+              {this.state.searchGroupMemberInputValue ?
+                <Button color="secondary" onClick={this.searchGroupMember}>{gettext('Search')}</Button> :
+                <Button color="secondary" disabled>{gettext('Search')}</Button>
+              }
+            </div>
+          </FormGroup>
           {
             this.state.errMessage.length > 0 &&
             this.state.errMessage.map((item, index = 0) => {
diff --git a/frontend/src/css/manage-members-dialog.css b/frontend/src/css/manage-members-dialog.css
index 265f31bdd2..8e553c1722 100644
--- a/frontend/src/css/manage-members-dialog.css
+++ b/frontend/src/css/manage-members-dialog.css
@@ -33,17 +33,22 @@
   display: none;
 }
 
-.add-members {
+.add-members,
+.search-members {
   display: flex;
   justify-content: space-between;
 }
 
-.add-members .add-members-select {
+.add-members .add-members-select,
+.search-members .search-members-input {
   width: 385px;
 }
-.add-members .btn {
+
+.add-members .btn,
+.search-members .btn {
   width: 75px;
 }
+
 .group-error {
   margin-top: 10px;
 }
\ No newline at end of file
diff --git a/seahub/api2/endpoints/group_members.py b/seahub/api2/endpoints/group_members.py
index 725a1fe4d5..b5e0726a30 100644
--- a/seahub/api2/endpoints/group_members.py
+++ b/seahub/api2/endpoints/group_members.py
@@ -133,10 +133,42 @@ class GroupMembers(APIView):
         return Response(member_info, status=status.HTTP_201_CREATED)
 
 
+class GroupSearchMember(APIView):
+
+    authentication_classes = (TokenAuthentication, SessionAuthentication)
+    permission_classes = (IsAuthenticated,)
+    throttle_classes = (UserRateThrottle,)
+
+    @api_check_group
+    def get(self, request, group_id, format=None):
+        """
+        Search group member by email.
+        """
+
+        q = request.GET.get('q', '')
+        if not q:
+            error_msg = 'q invalid.'
+            return api_error(status.HTTP_400_BAD_REQUEST, error_msg)
+
+        if not is_group_member(group_id, request.user.username):
+            error_msg = 'Permission denied.'
+            return api_error(status.HTTP_403_FORBIDDEN, error_msg)
+
+        group_members = []
+        members = ccnet_api.search_group_members(group_id, q)
+        for member in members:
+
+            member_info = get_group_member_info(request, group_id, member.user_name)
+
+            group_members.append(member_info)
+
+        return Response(group_members)
+
+
 class GroupMember(APIView):
     authentication_classes = (TokenAuthentication, SessionAuthentication)
     permission_classes = (IsAuthenticated,)
-    throttle_classes = (UserRateThrottle, )
+    throttle_classes = (UserRateThrottle,)
 
     @api_check_group
     def get(self, request, group_id, email):
diff --git a/seahub/urls.py b/seahub/urls.py
index 8ab11913a7..d9eeaa2f5f 100644
--- a/seahub/urls.py
+++ b/seahub/urls.py
@@ -36,7 +36,7 @@ from seahub.api2.endpoints.group_owned_libraries import GroupOwnedLibraries, \
 from seahub.api2.endpoints.address_book.groups import AddressBookGroupsSubGroups
 from seahub.api2.endpoints.address_book.members import AddressBookGroupsSearchMember
 
-from seahub.api2.endpoints.group_members import GroupMembers, GroupMember, \
+from seahub.api2.endpoints.group_members import GroupMembers, GroupSearchMember, GroupMember, \
         GroupMembersBulk, GroupMembersImport, GroupMembersImportExample
 from seahub.api2.endpoints.search_group import SearchGroup
 from seahub.api2.endpoints.share_links import ShareLinks, ShareLink, \
@@ -307,6 +307,7 @@ urlpatterns = [
     url(r'^api/v2.1/groups/(?P<group_id>\d+)/group-owned-libraries/$', GroupOwnedLibraries.as_view(), name='api-v2.1-group-owned-libraries'),
     url(r'^api/v2.1/groups/(?P<group_id>\d+)/group-owned-libraries/(?P<repo_id>[-0-9a-f]{36})/$', GroupOwnedLibrary.as_view(), name='api-v2.1-owned-group-library'),
     url(r'^api/v2.1/groups/(?P<group_id>\d+)/members/$', GroupMembers.as_view(), name='api-v2.1-group-members'),
+    url(r'^api/v2.1/groups/(?P<group_id>\d+)/search-member/$', GroupSearchMember.as_view(), name='api-v2.1-group-search-member'),
     url(r'^api/v2.1/groups/(?P<group_id>\d+)/members/bulk/$', GroupMembersBulk.as_view(), name='api-v2.1-group-members-bulk'),
     url(r'^api/v2.1/groups/(?P<group_id>\d+)/members/import/$', GroupMembersImport.as_view(), name='api-v2.1-group-members-import'),
     url(r'^api/v2.1/group-members-import-example/$', GroupMembersImportExample.as_view(), name='api-v2.1-group-members-import-example'),