diff --git a/pallets/slp/src/lib.rs b/pallets/slp/src/lib.rs
index 68fe4b5cad..408f01959a 100644
--- a/pallets/slp/src/lib.rs
+++ b/pallets/slp/src/lib.rs
@@ -134,6 +134,9 @@ pub mod pallet {
 		/// on_initialize queue.
 		#[pallet::constant]
 		type MaxTypeEntryPerBlock: Get<u32>;
+
+		#[pallet::constant]
+		type MaxRefundPerBlock: Get<u32>;
 	}
 
 	#[pallet::error]
@@ -1011,6 +1014,10 @@ pub mod pallet {
 			let mut exit_account_balance =
 				T::MultiCurrency::free_balance(currency_id, &exit_account);
 
+			if exit_account_balance.is_zero() {
+				return Ok(());
+			}
+
 			// Get the currency due unlocking records
 			let time_unit = T::VtokenMinting::get_ongoing_time_unit(currency_id)
 				.ok_or(Error::<T>::TimeUnitNotExist)?;
@@ -1018,7 +1025,12 @@ pub mod pallet {
 
 			// Refund due unlocking records one by one.
 			if let Some((_locked_amount, idx_vec)) = rs {
+				let mut counter = 0;
+
 				for idx in idx_vec.iter() {
+					if counter >= T::MaxRefundPerBlock::get() {
+						break;
+					}
 					// get idx record amount
 					let idx_record_amount_op =
 						T::VtokenMinting::get_token_unlock_ledger(currency_id, *idx);
@@ -1048,6 +1060,8 @@ pub mod pallet {
 							amount: deduct_amount,
 						});
 
+						counter = counter.saturating_add(1);
+
 						exit_account_balance = exit_account_balance
 							.checked_sub(&deduct_amount)
 							.ok_or(Error::<T>::UnderFlow)?;
@@ -1056,19 +1070,16 @@ pub mod pallet {
 						}
 					}
 				}
+			} else {
+				// Automatically move the rest amount in exit account to entrance account.
+				T::MultiCurrency::transfer(
+					currency_id,
+					&exit_account,
+					&entrance_account,
+					exit_account_balance,
+				)?;
 			}
 
-			// Automatically move the rest amount in exit account to entrance account.
-			let new_exit_account_balance =
-				T::MultiCurrency::free_balance(currency_id, &exit_account);
-
-			T::MultiCurrency::transfer(
-				currency_id,
-				&exit_account,
-				&entrance_account,
-				new_exit_account_balance,
-			)?;
-
 			Ok(())
 		}
 
diff --git a/pallets/slp/src/mock.rs b/pallets/slp/src/mock.rs
index 8e55c3212d..fc63e0c7cc 100644
--- a/pallets/slp/src/mock.rs
+++ b/pallets/slp/src/mock.rs
@@ -218,7 +218,8 @@ impl Get<ParaId> for ParachainId {
 }
 
 parameter_types! {
-	pub const MaxTypeEntryPerBlock: u32 = 50;
+	pub const MaxTypeEntryPerBlock: u32 = 10;
+	pub const MaxRefundPerBlock: u32 = 10;
 }
 
 impl QueryResponseManager<QueryId, MultiLocation, u64> for () {
@@ -245,6 +246,7 @@ impl Config for Runtime {
 	type XcmExecutor = ();
 	type SubstrateResponseManager = ();
 	type MaxTypeEntryPerBlock = MaxTypeEntryPerBlock;
+	type MaxRefundPerBlock = MaxRefundPerBlock;
 }
 
 pub struct ExtBuilder {
diff --git a/pallets/slp/src/tests.rs b/pallets/slp/src/tests.rs
index ded3dc4686..a594d39a0d 100644
--- a/pallets/slp/src/tests.rs
+++ b/pallets/slp/src/tests.rs
@@ -374,12 +374,17 @@ fn refund_currency_due_unbond_works() {
 		assert_eq!(bifrost_vtoken_minting::UserUnlockLedger::<Runtime>::get(EDDIE, KSM,), None);
 
 		// check account balances
-		assert_eq!(Tokens::free_balance(KSM, &exit_acc), 0);
-		assert_eq!(Tokens::free_balance(KSM, &entrance_acc), 17);
+		assert_eq!(Tokens::free_balance(KSM, &exit_acc), 17);
+		assert_eq!(Tokens::free_balance(KSM, &entrance_acc), 0);
 		assert_eq!(Tokens::free_balance(KSM, &BOB), 0);
 		assert_eq!(Tokens::free_balance(KSM, &CHARLIE), 28);
 		assert_eq!(Tokens::free_balance(KSM, &DAVE), 22);
 		assert_eq!(Tokens::free_balance(KSM, &EDDIE), 13);
+		assert_ok!(Slp::refund_currency_due_unbond(Origin::signed(ALICE), KSM));
+
+		// check account balances
+		assert_eq!(Tokens::free_balance(KSM, &exit_acc), 0);
+		assert_eq!(Tokens::free_balance(KSM, &entrance_acc), 17);
 	});
 }
 
diff --git a/runtime/bifrost-kusama/src/lib.rs b/runtime/bifrost-kusama/src/lib.rs
index a9c64cbdc1..f15554da1f 100644
--- a/runtime/bifrost-kusama/src/lib.rs
+++ b/runtime/bifrost-kusama/src/lib.rs
@@ -1691,7 +1691,8 @@ impl xcm_interface::Config for Runtime {
 }
 
 parameter_types! {
-	pub const MaxTypeEntryPerBlock: u32 = 50;
+	pub const MaxTypeEntryPerBlock: u32 = 10;
+	pub const MaxRefundPerBlock: u32 = 10;
 }
 
 pub struct SubstrateResponseManager;
@@ -1733,6 +1734,7 @@ impl bifrost_slp::Config for Runtime {
 	type XcmExecutor = XcmExecutor<XcmConfig>;
 	type SubstrateResponseManager = SubstrateResponseManager;
 	type MaxTypeEntryPerBlock = MaxTypeEntryPerBlock;
+	type MaxRefundPerBlock = MaxRefundPerBlock;
 }
 
 impl bifrost_vstoken_conversion::Config for Runtime {