diff --git a/src/rootserver/restore/ob_restore_scheduler.cpp b/src/rootserver/restore/ob_restore_scheduler.cpp
index 09ad407810..60d2d6bca8 100644
--- a/src/rootserver/restore/ob_restore_scheduler.cpp
+++ b/src/rootserver/restore/ob_restore_scheduler.cpp
@@ -1505,20 +1505,33 @@ int ObRestoreService::reset_schema_status(const uint64_t tenant_id, common::ObMy
 int ObRestoreService::may_update_restore_concurrency_(const uint64_t new_tenant_id, const share::ObPhysicalRestoreJob &job_info)
 {
   int ret = OB_SUCCESS;
-  const int64_t concurrency = job_info.get_concurrency();
-  const ObString &tenant_name = job_info.get_tenant_name();
+  double cpu_count = 0;
   int64_t ha_high_thread_score = 0;
   omt::ObTenantConfigGuard tenant_config(TENANT_CONF(new_tenant_id));
-  if (tenant_config.is_valid()) {
-    ha_high_thread_score = tenant_config->ha_high_thread_score;
-  }
+  // restore concurrency controls the number of threads used by restore dag.
+  // if cpu number is less than 10, use the default value.
+  // if cpu number is between 10 ~ 100, let concurrency equals to the cpu number.
+  // if cpu number is exceed 100,  let concurrency equals to 100.
+  const int64_t LOW_CPU_LIMIT = 10;
+  const int64_t MAX_CPU_LIMIT = 100;
   if (!job_info.is_valid()) {
     ret = OB_INVALID_ARGUMENT;
     LOG_WARN("get invalid args", K(ret), K(job_info));
-  } else if (0 == concurrency || 0 != ha_high_thread_score) {
-    LOG_INFO("do nothing", K(concurrency), K(ha_high_thread_score));
-  } else if (OB_FAIL(update_restore_concurrency_(tenant_name, new_tenant_id, concurrency))) {
-    LOG_WARN("failed to update restore concurrency", K(ret), K(job_info));
+  } else if (tenant_config.is_valid() && OB_FALSE_IT(ha_high_thread_score = tenant_config->ha_high_thread_score)) {
+  } else if (0 != ha_high_thread_score) {
+    LOG_INFO("ha high thread score has been set", K(ha_high_thread_score));
+  } else if (OB_FAIL(ObRestoreUtil::get_restore_tenant_cpu_count(*sql_proxy_, new_tenant_id, cpu_count))) {
+    LOG_WARN("failed to get restore tenant cpu count", K(ret), K(new_tenant_id));
+  } else {
+    int64_t concurrency = job_info.get_concurrency();
+    if (LOW_CPU_LIMIT < cpu_count && MAX_CPU_LIMIT >= cpu_count) {
+      concurrency = std::max(static_cast<int64_t>(cpu_count), concurrency);
+    } else if (MAX_CPU_LIMIT < cpu_count) {
+      concurrency = MAX_CPU_LIMIT;
+    }
+    if (OB_FAIL(update_restore_concurrency_(job_info.get_tenant_name(), new_tenant_id, concurrency))) {
+      LOG_WARN("failed to update restore concurrency", K(ret), K(job_info));
+    }
   }
   return ret;
 }
diff --git a/src/rootserver/restore/ob_restore_util.cpp b/src/rootserver/restore/ob_restore_util.cpp
index d07dbae2e5..6cf265c42e 100644
--- a/src/rootserver/restore/ob_restore_util.cpp
+++ b/src/rootserver/restore/ob_restore_util.cpp
@@ -29,6 +29,7 @@
 #include "storage/ls/ob_ls_meta_package.h"//ls_meta
 #include "share/backup/ob_archive_path.h"
 #include "share/ob_upgrade_utils.h"
+#include "share/ob_unit_table_operator.h"
 
 using namespace oceanbase::common;
 using namespace oceanbase;
@@ -970,6 +971,37 @@ int ObRestoreUtil::check_physical_restore_finish(
   return ret;
 }
 
+int ObRestoreUtil::get_restore_tenant_cpu_count(
+    common::ObMySQLProxy &proxy, const uint64_t tenant_id, double &cpu_count)
+{
+  int ret = OB_SUCCESS;
+  share::ObUnitTableOperator unit_op;
+  common::ObArray<share::ObResourcePool> pools;
+  common::ObArray<uint64_t> unit_config_ids;
+  common::ObArray<ObUnitConfig> configs;
+  if (OB_FAIL(unit_op.init(proxy))) {
+    LOG_WARN("failed to init proxy", K(ret));
+  } else if (OB_FAIL(unit_op.get_resource_pools(tenant_id, pools))) {
+    LOG_WARN("failed to get resource pool", K(ret), K(tenant_id));
+  }
+  ARRAY_FOREACH(pools, i) {
+    if (OB_FAIL(unit_config_ids.push_back(pools.at(i).unit_config_id_))) {
+      LOG_WARN("failed to push back unit config", K(ret));
+    }
+  }
+  if (FAILEDx(unit_op.get_unit_configs(unit_config_ids, configs))) {
+    LOG_WARN("failed to get unit configs", K(ret));
+  }
+  double max_cpu = OB_MAX_CPU_NUM;
+  ARRAY_FOREACH(configs, i) {
+    max_cpu = std::min(max_cpu, configs.at(i).max_cpu());
+  }
+  if (OB_SUCC(ret)) {
+    cpu_count = max_cpu;
+  }
+  return ret;
+}
+
 int ObRestoreUtil::convert_restore_timestamp_to_scn_(
     const ObString &timestamp,
     const common::ObTimeZoneInfoWrap &time_zone_wrap,
diff --git a/src/rootserver/restore/ob_restore_util.h b/src/rootserver/restore/ob_restore_util.h
index f51e6bbd6b..fae40eb154 100644
--- a/src/rootserver/restore/ob_restore_util.h
+++ b/src/rootserver/restore/ob_restore_util.h
@@ -72,7 +72,7 @@ public:
                                            const share::ObLSID &ls_id,
                                            palf::PalfBaseInfo &palf_base_info);
   static int check_physical_restore_finish(common::ObISQLClient &proxy, uint64_t tenant_id, bool &is_finish, bool &is_failed);
-
+  static int get_restore_tenant_cpu_count(common::ObMySQLProxy &proxy, const uint64_t tenant_id, double &cpu_count);
 private:
   static int fill_backup_info_(
              const obrpc::ObPhysicalRestoreTenantArg &arg,