diff --git a/UefiCpuPkg/CpuMpPei/CpuMpPei.h b/UefiCpuPkg/CpuMpPei/CpuMpPei.h
index 6f508b420b..7c8a218e0e 100644
--- a/UefiCpuPkg/CpuMpPei/CpuMpPei.h
+++ b/UefiCpuPkg/CpuMpPei/CpuMpPei.h
@@ -198,16 +198,6 @@ AsmInitializeGdt (
   IN IA32_DESCRIPTOR  *Gdtr
   );
 
-/**
-  Assembly code to do CLI-HALT loop.
-
-**/
-VOID
-EFIAPI
-AsmCliHltLoop (
-  VOID
-  );
-
 /**
   Get available system memory below 1MB by specified size.
 
diff --git a/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.asm b/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.asm
index eb23a16917..ab78bcc07b 100644
--- a/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.asm
+++ b/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.asm
@@ -144,12 +144,6 @@ CProcedureInvoke:
 RendezvousFunnelProc   ENDP
 RendezvousFunnelProcEnd::
 
-AsmCliHltLoop PROC near C PUBLIC
-    cli
-    hlt
-    jmp        $-2
-AsmCliHltLoop ENDP
-
 ;-------------------------------------------------------------------------------------
 ;  AsmGetAddressMap (&AddressMap);
 ;-------------------------------------------------------------------------------------
diff --git a/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.nasm b/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.nasm
index 5d2da82d14..2ff16dc297 100644
--- a/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.nasm
+++ b/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.nasm
@@ -132,12 +132,6 @@ CProcedureInvoke:
     jmp        $                 ; never reach here
 RendezvousFunnelProcEnd:
 
-global ASM_PFX(AsmCliHltLoop)
-ASM_PFX(AsmCliHltLoop):
-    cli
-    hlt
-    jmp        $-2
-
 ;-------------------------------------------------------------------------------------
 ;  AsmGetAddressMap (&AddressMap);
 ;-------------------------------------------------------------------------------------
diff --git a/UefiCpuPkg/CpuMpPei/X64/MpFuncs.asm b/UefiCpuPkg/CpuMpPei/X64/MpFuncs.asm
index fad5e8d443..1bb3b6d6b6 100644
--- a/UefiCpuPkg/CpuMpPei/X64/MpFuncs.asm
+++ b/UefiCpuPkg/CpuMpPei/X64/MpFuncs.asm
@@ -181,12 +181,6 @@ CProcedureInvoke:
 RendezvousFunnelProc   ENDP
 RendezvousFunnelProcEnd::
 
-AsmCliHltLoop PROC
-    cli
-    hlt
-    jmp $-2
-AsmCliHltLoop ENDP
-
 ;-------------------------------------------------------------------------------------
 ;  AsmGetAddressMap (&AddressMap);
 ;-------------------------------------------------------------------------------------
diff --git a/UefiCpuPkg/CpuMpPei/X64/MpFuncs.nasm b/UefiCpuPkg/CpuMpPei/X64/MpFuncs.nasm
index 0b2e879905..00e5f58758 100644
--- a/UefiCpuPkg/CpuMpPei/X64/MpFuncs.nasm
+++ b/UefiCpuPkg/CpuMpPei/X64/MpFuncs.nasm
@@ -175,12 +175,6 @@ CProcedureInvoke:
 
 RendezvousFunnelProcEnd:
 
-global ASM_PFX(AsmCliHltLoop)
-ASM_PFX(AsmCliHltLoop):
-    cli
-    hlt
-    jmp $-2
-
 ;-------------------------------------------------------------------------------------
 ;  AsmGetAddressMap (&AddressMap);
 ;-------------------------------------------------------------------------------------