diff --git a/web/app/controllers/super_manage.php b/web/app/controllers/super_manage.php
index 844e868..a73f751 100644
--- a/web/app/controllers/super_manage.php
+++ b/web/app/controllers/super_manage.php
@@ -38,6 +38,10 @@ $tabs_info = [
 		'name' => '图床管理',
 		'url' => "/super_manage/image_hosting",
 	],
+	'meta' => [
+		'name' => 'OJ 基础设置',
+		'url' => "/super_manage/meta",
+	],
 ];
 
 if (!isset($tabs_info[$cur_tab])) {
@@ -1068,6 +1072,41 @@ if ($cur_tab == 'index') {
 		]);
 	};
 	$change_user_image_total_size_limit_form->runAtServer();
+} elseif ($cur_tab == 'meta') {
+	$submission_frequency = UOJContext::getMeta('submission_frequency');
+	$submission_frequency_form = new UOJForm('submission_frequency');
+	$submission_frequency_form->addSelect('submission_frequency_interval', [
+		'label' => '时间间隔',
+		'options' => [
+			'PT1S' => '1 秒',
+			'PT10S' => '10 秒',
+			'PT1M' => '1 分钟',
+			'PT10M' => '10 分钟',
+			'PT30M' => '30 分钟',
+			'PT1H' => '1 小时',
+		],
+		'default_value' => $submission_frequency['interval'],
+	]);
+	$submission_frequency_form->addInput('submission_frequency_limit', [
+		'label' => '最大提交次数',
+		'help' => '在时间间隔内最多允许提交的次数。',
+		'default_value' => $submission_frequency['limit'],
+		'validator_php' => function ($x, &$vdata) {
+			if (!validateUInt($x)) {
+				return '不合法';
+			}
+			$vdata['limit'] = (int)$x;
+			return '';
+		},
+	]);
+	$submission_frequency_form->handle = function (&$vdata) {
+		UOJContext::setMeta('submission_frequency', [
+			'interval' => UOJRequest::post('submission_frequency_interval'),
+			'limit' => $vdata['limit'],
+		]);
+	};
+	$submission_frequency_form->succ_href = UOJContext::requestPath() . '#submission-frequency';
+	$submission_frequency_form->runAtServer();
 }
 ?>
 
@@ -1463,21 +1502,6 @@ if ($cur_tab == 'index') {
 					</div>
 				</div>
 			</div>
-
-			<script>
-				$(document).ready(function() {
-					// Javascript to enable link to tab
-					var hash = location.hash.replace(/^#/, '');
-					if (hash) {
-						bootstrap.Tab.jQueryInterface.call($('.nav-tabs a[href="#' + hash + '"]'), 'show').blur();
-					}
-
-					// Change hash for page-reload
-					$('.nav-tabs a').on('shown.bs.tab', function(e) {
-						window.location.hash = e.target.hash;
-					});
-				});
-			</script>
 		<?php elseif ($cur_tab === 'submissions') : ?>
 			<?php if (!isset($_GET['judging'])) : ?>
 				<div>
@@ -1660,9 +1684,48 @@ EOD;
 					<?php $change_user_image_total_size_limit_form->printHTML() ?>
 				</div>
 			</div>
+		<?php elseif ($cur_tab == 'meta') : ?>
+			<div class="card mt-3 mt-md-0">
+				<div class="card-header">
+					<ul class="nav nav-tabs card-header-tabs">
+						<li class="nav-item">
+							<a class="nav-link active" href="#submission-frequency" data-bs-toggle="tab" data-bs-target="#submission-frequency">提交频次限制</a>
+						</li>
+					</ul>
+				</div>
+				<div class="card-body">
+					<div class="tab-content">
+						<div class="tab-pane active" id="submission-frequency">
+							<div class="row">
+								<div class="col-md-6">
+									<?php $submission_frequency_form->printHTML() ?>
+								</div>
+								<div class="col-md-6">
+									此处可以设置用户的提交频次限制。请注意，过于严格的限制会导致用户无法正常提交题目。默认限制为 1 秒内最多提交 1 次。
+								</div>
+							</div>
+						</div>
+					</div>
+				</div>
+			</div>
 		<?php endif ?>
 	</div>
 	<!-- end right col -->
 </div>
 
+<script>
+	$(document).ready(function() {
+		// Javascript to enable link to tab
+		var hash = location.hash.replace(/^#/, '');
+		if (hash) {
+			bootstrap.Tab.jQueryInterface.call($('.nav-tabs a[href="#' + hash + '"]'), 'show').blur();
+		}
+
+		// Change hash for page-reload
+		$('.nav-tabs a').on('shown.bs.tab', function(e) {
+			window.location.hash = e.target.hash;
+		});
+	});
+</script>
+
 <?php echoUOJPageFooter() ?>
diff --git a/web/app/libs/uoj-security-lib.php b/web/app/libs/uoj-security-lib.php
index 3398271..1ecaf0f 100644
--- a/web/app/libs/uoj-security-lib.php
+++ b/web/app/libs/uoj-security-lib.php
@@ -36,8 +36,10 @@ function crsf_defend() {
 }
 
 function submission_frequency_check() {
+	$submission_frequency = UOJContext::getMeta('submission_frequency');
+
 	$recent = clone UOJTime::$time_now;
-	$recent->sub(new DateInterval("PT1S"));
+	$recent->sub(new DateInterval($submission_frequency['interval']));
 	$num = DB::selectCount([
 		"select count(*) from submissions",
 		"where", [
@@ -45,54 +47,10 @@ function submission_frequency_check() {
 			["submit_time", ">=", $recent->format('Y-m-d H:i:s')]
 		]
 	]);
-	if ($num >= 1) {
+
+	if ($num >= max(1, $submission_frequency['limit'])) {
 		return false;
 	}
 
-	// use the implementation below if OJ is under attack
-	/*
-	// 1
-	$recent = clone UOJTime::$time_now;
-	$recent->sub(new DateInterval("PT3S"));
-	$num = DB::selectCount([
-		"select count(*) from submissions",
-		"where", [
-			"submitter" => Auth::id(),
-			["submit_time", ">=", $recent->format('Y-m-d H:i:s')]
-		]
-	]);
-	if ($num >= 1) {
-		return false;
-	}
-	
-	// 2
-	$recent = clone UOJTime::$time_now;
-	$recent->sub(new DateInterval("PT1M"));
-	$num = DB::selectCount([
-		"select count(*) from submissions",
-		"where", [
-			"submitter" => Auth::id(),
-			["submit_time", ">=", $recent->format('Y-m-d H:i:s')]
-		]
-	]);
-	if ($num >= 6) {
-		return false;
-	}
-	
-	// 3
-	$recent = clone UOJTime::$time_now;
-	$recent->sub(new DateInterval("PT30M"));
-	$num = DB::selectCount([
-		"select count(*) from submissions",
-		"where", [
-			"submitter" => Auth::id(),
-			["submit_time", ">=", $recent->format('Y-m-d H:i:s')]
-		]
-	]);
-	if ($num >= 30) {
-		return false;
-	}
-	*/
-	
 	return true;
 }
diff --git a/web/app/models/UOJContext.php b/web/app/models/UOJContext.php
index 69fb082..a428d34 100644
--- a/web/app/models/UOJContext.php
+++ b/web/app/models/UOJContext.php
@@ -36,6 +36,10 @@ class UOJContext {
 				'upload_image' => true,
 			],
 		],
+		'submission_frequency' => [
+			'interval' => 'PT1S',
+			'limit' => 1,
+		],
 	];
 
 	public static $data = [
@@ -156,6 +160,7 @@ class UOJContext {
 			"select value from meta",
 			"where", ['name' => $name]
 		]);
+
 		if ($value === null) {
 			return self::$meta_default[$name];
 		} else {
@@ -165,6 +170,7 @@ class UOJContext {
 
 	public static function setMeta($name, $value) {
 		$value = json_encode($value);
+
 		return DB::update([
 			"insert into meta", DB::bracketed_fields(['name', 'value', 'updated_at']),
 			"values", DB::tuple([$name, $value, DB::now()]),