diff --git a/frontend/src/components/dialog/generate-share-link.js b/frontend/src/components/dialog/generate-share-link.js
index 5a8ac8c3e1..840d254648 100644
--- a/frontend/src/components/dialog/generate-share-link.js
+++ b/frontend/src/components/dialog/generate-share-link.js
@@ -3,8 +3,9 @@ import PropTypes from 'prop-types';
 import moment from 'moment';
 import copy from 'copy-to-clipboard';
 import { Button, Form, FormGroup, Label, Input, InputGroup, InputGroupAddon, Alert } from 'reactstrap';
-import { gettext, shareLinkExpireDaysMin, shareLinkExpireDaysMax } from '../../utils/constants';
+import { gettext, shareLinkExpireDaysMin, shareLinkExpireDaysMax, shareLinkPasswordMinLength } from '../../utils/constants';
 import { seafileAPI } from '../../utils/seafile-api';
+import { Utils } from '../../utils/utils';
 import SharedLinkInfo from '../../models/shared-link-info';
 import toaster from '../toast';
 
@@ -68,7 +69,7 @@ class GenerateShareLink extends React.Component {
   }
 
   generatePassword = () => {
-    let val = Math.random().toString(36).substr(5);
+    let val = Utils.generatePassword(shareLinkPasswordMinLength);
     this.setState({
       password: val,
       passwdnew: val
@@ -165,7 +166,7 @@ class GenerateShareLink extends React.Component {
         this.setState({errorInfo: 'Please enter password'});
         return false;
       }
-      if (password.length < 8) {
+      if (password.length < shareLinkPasswordMinLength) {
         this.setState({errorInfo: 'Password is too short'});
         return false;
       }
@@ -237,6 +238,10 @@ class GenerateShareLink extends React.Component {
   }
 
   render() {
+
+    let passwordLengthTip = gettext('(at least {passwordLength} characters)');
+    passwordLengthTip = passwordLengthTip.replace('{passwordLength}', shareLinkPasswordMinLength);
+
     if (this.state.sharedLinkInfo) {
       let sharedLinkInfo = this.state.sharedLinkInfo;
       return (
@@ -293,7 +298,7 @@ class GenerateShareLink extends React.Component {
           {this.state.isShowPasswordInput &&
             <FormGroup className="link-operation-content">
               {/* todo translate  */}
-              <Label className="font-weight-bold">{gettext('Password')}</Label>{' '}<span className="tip">{gettext('(at least 8 characters)')}</span>
+              <Label className="font-weight-bold">{gettext('Password')}</Label>{' '}<span className="tip">{passwordLengthTip}</span>
               <InputGroup className="passwd">
                 <Input type={this.state.isPasswordVisible ? 'text' : 'password'} value={this.state.password || ''} onChange={this.inputPassword}/>
                 <InputGroupAddon addonType="append">
diff --git a/frontend/src/components/dialog/generate-upload-link.js b/frontend/src/components/dialog/generate-upload-link.js
index 2e349f679c..fd671a579f 100644
--- a/frontend/src/components/dialog/generate-upload-link.js
+++ b/frontend/src/components/dialog/generate-upload-link.js
@@ -2,8 +2,9 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import copy from 'copy-to-clipboard';
 import { Button, Form, FormGroup, FormText, Label, Input, InputGroup, InputGroupAddon, Alert } from 'reactstrap';
-import { gettext } from '../../utils/constants';
+import { gettext, shareLinkPasswordMinLength } from '../../utils/constants';
 import { seafileAPI } from '../../utils/seafile-api';
+import { Utils } from '../../utils/utils';
 import SharedUploadInfo from '../../models/shared-upload-info';
 import toaster from '../toast';
 
@@ -56,7 +57,7 @@ class GenerateUploadLink extends React.Component {
   }
 
   generatePassword = () => {
-    let val = Math.random().toString(36).substr(5);
+    let val = Utils.generatePassword(shareLinkPasswordMinLength);
     this.setState({
       password: val,
       passwordnew: val
@@ -84,7 +85,7 @@ class GenerateUploadLink extends React.Component {
         errorInfo: gettext('Please enter password')
       });
     }
-    else if (this.state.showPasswordInput && (this.state.showPasswordInput && this.state.password.length < 8)) {
+    else if (this.state.showPasswordInput && (this.state.showPasswordInput && this.state.password.length < shareLinkPasswordMinLength)) {
       this.setState({
         errorInfo: gettext('Password is too short')
       });
@@ -121,6 +122,10 @@ class GenerateUploadLink extends React.Component {
   }
 
   render() {
+
+    let passwordLengthTip = gettext('(at least {passwordLength} characters)');
+    passwordLengthTip = passwordLengthTip.replace('{passwordLength}', shareLinkPasswordMinLength);
+
     if (this.state.sharedUploadInfo) {
       let sharedUploadInfo = this.state.sharedUploadInfo;
       return (
@@ -151,7 +156,7 @@ class GenerateUploadLink extends React.Component {
         {this.state.showPasswordInput &&
           <FormGroup className="link-operation-content">
             {/* todo translate  */}
-            <Label className="font-weight-bold">{gettext('Password')}</Label>{' '}<span className="tip">{gettext('(at least 8 characters)')}</span>
+            <Label className="font-weight-bold">{gettext('Password')}</Label>{' '}<span className="tip">{passwordLengthTip}</span>
             <InputGroup className="passwd">
               <Input type={this.state.passwordVisible ? 'text':'password'} value={this.state.password || ''} onChange={this.inputPassword}/>
               <InputGroupAddon addonType="append">
diff --git a/frontend/src/utils/constants.js b/frontend/src/utils/constants.js
index fcc07050bb..2f51bfe9f3 100644
--- a/frontend/src/utils/constants.js
+++ b/frontend/src/utils/constants.js
@@ -35,6 +35,7 @@ export const enableUploadFolder = window.app.pageOptions.enableUploadFolder ===
 export const enableResumableFileUpload = window.app.pageOptions.enableResumableFileUpload === 'True';
 export const storages = window.app.pageOptions.storages; // storage backends
 export const enableRepoSnapshotLabel = window.app.pageOptions.enableRepoSnapshotLabel;
+export const shareLinkPasswordMinLength = window.app.pageOptions.shareLinkPasswordMinLength;
 export const shareLinkExpireDaysMin = window.app.pageOptions.shareLinkExpireDaysMin;
 export const shareLinkExpireDaysMax = window.app.pageOptions.shareLinkExpireDaysMax;
 export const maxFileName = window.app.pageOptions.maxFileName;
diff --git a/frontend/src/utils/utils.js b/frontend/src/utils/utils.js
index a39a5f8b2a..b9bd17c5fd 100644
--- a/frontend/src/utils/utils.js
+++ b/frontend/src/utils/utils.js
@@ -813,4 +813,13 @@ export const Utils = {
     }
   },
 
+  generatePassword: function(passwordLength) {
+    let possible = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz0123456789';
+    let password = '';
+    for (let i = 0; i < passwordLength; i++) {
+      password += possible.charAt(Math.floor(Math.random() * possible.length));
+    }
+    return password;
+  }
+
 };
diff --git a/seahub/templates/base_for_react.html b/seahub/templates/base_for_react.html
index 0dd23e9f9a..9424d82aee 100644
--- a/seahub/templates/base_for_react.html
+++ b/seahub/templates/base_for_react.html
@@ -73,6 +73,7 @@
               return storages;
             })(),
             enableRepoSnapshotLabel: {% if enable_repo_snapshot_label %} true {% else %} false {% endif %},
+            shareLinkPasswordMinLength: {{ share_link_password_min_length }},
             shareLinkExpireDaysMin: "{{ share_link_expire_days_min }}",
             shareLinkExpireDaysMax: "{{ share_link_expire_days_max }}",
             maxFileName: "{{ max_file_name }}",