diff --git a/pom.xml b/pom.xml
index be47bdd..01a3771 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,6 +26,11 @@
 
 
     <dependencies>
+        <dependency>
+            <groupId>io.lettuce</groupId>
+            <artifactId>lettuce-core</artifactId>
+            <version>6.4.0.RELEASE</version>
+        </dependency>
         <dependency>
             <groupId>com.moandjiezana.toml</groupId>
             <artifactId>toml4j</artifactId>
diff --git a/src/main/kotlin/biz/cdkey.kt b/src/main/kotlin/biz/cdkey.kt
index d7ad7ea..614700f 100644
--- a/src/main/kotlin/biz/cdkey.kt
+++ b/src/main/kotlin/biz/cdkey.kt
@@ -1,6 +1,7 @@
 package biz
 
 
+import config.RDS
 import datasource.DB
 import exception.ServiceException
 import model.PlanParams
@@ -12,7 +13,9 @@ import org.ktorm.dsl.*
 import utils.throwIf
 import utils.throwIfNot
 import java.nio.ByteBuffer
+import java.time.Duration
 import java.time.LocalDateTime
+import java.time.format.DateTimeFormatter
 import java.util.concurrent.ThreadLocalRandom
 import java.util.concurrent.atomic.AtomicInteger
 import kotlin.math.abs
@@ -98,6 +101,8 @@ fun validateCDK(params: ValidateParams): Resp {
         (eId != specId).throwIf("CDK已被使用")
     }
 
+    limit(cdk)
+
     // log
     DB.insert(OperationLog) {
         set(OperationLog.cdk, cdk)
@@ -108,3 +113,16 @@ fun validateCDK(params: ValidateParams): Resp {
 
     return Resp.success()
 }
+
+private fun limit(cdk: String) {
+    val date = DateTimeFormatter.ofPattern("yyyy-MM-dd").format(LocalDateTime.now())
+    val key = "limit:${date}:${cdk}"
+    val cnt = RDS.get().get(key).get()?.toIntOrNull() ?: 0
+    (cnt > 7).throwIf("您的账号已被限制")
+
+    RDS.get().incr(key).get()
+
+    if (cnt == 0) {
+        RDS.get().expire(key, Duration.ofDays(1))
+    }
+}
diff --git a/src/main/kotlin/config/props.kt b/src/main/kotlin/config/props.kt
index 3c3db0d..970cb47 100644
--- a/src/main/kotlin/config/props.kt
+++ b/src/main/kotlin/config/props.kt
@@ -47,4 +47,10 @@ object Props {
 
         fun get(key: String): String = TomlStore.config.value.getString("datasource.$key")
     }
+
+    object Redis {
+        val url: String by lazy {
+            TomlStore.config.value.getString("redis.url")
+        }
+    }
 }
diff --git a/src/main/kotlin/config/redis.kt b/src/main/kotlin/config/redis.kt
new file mode 100644
index 0000000..d732b16
--- /dev/null
+++ b/src/main/kotlin/config/redis.kt
@@ -0,0 +1,17 @@
+package config
+
+import io.lettuce.core.RedisClient
+import io.lettuce.core.api.StatefulRedisConnection
+import io.lettuce.core.api.async.RedisAsyncCommands
+
+object RDS {
+    private val single = run {
+        val client: RedisClient = RedisClient.create(Props.Redis.url)
+        val connection: StatefulRedisConnection<String, String> = client.connect()
+        connection.async()
+    }
+
+    fun get(): RedisAsyncCommands<String, String> {
+        return single
+    }
+}
\ No newline at end of file