diff --git a/.chronus/changes/export_more_api-2024-3-23-17-29-45.md b/.chronus/changes/export_more_api-2024-3-23-17-29-45.md
new file mode 100644
index 0000000000..28c1178915
--- /dev/null
+++ b/.chronus/changes/export_more_api-2024-3-23-17-29-45.md
@@ -0,0 +1,7 @@
+---
+changeKind: feature
+packages:
+  - "@azure-tools/typespec-client-generator-core"
+---
+
+export int and float type judgement function
\ No newline at end of file
diff --git a/packages/typespec-client-generator-core/src/interfaces.ts b/packages/typespec-client-generator-core/src/interfaces.ts
index e3dee7ba15..98f810ebb3 100644
--- a/packages/typespec-client-generator-core/src/interfaces.ts
+++ b/packages/typespec-client-generator-core/src/interfaces.ts
@@ -185,13 +185,21 @@ export function getKnownScalars(): Record<string, SdkBuiltInKinds> {
 export function isSdkBuiltInKind(kind: string): kind is SdkBuiltInKinds {
   return (
     kind in SdkBuiltInKindsMiscellaneousEnum ||
-    kind in SdkIntKindsEnum ||
-    kind in SdkFloatKindsEnum ||
+    isSdkIntKind(kind) ||
+    isSdkFloatKind(kind) ||
     kind in SdkGenericBuiltInStringKindsEnum ||
     kind in SdkAzureBuiltInStringKindsEnum
   );
 }
 
+export function isSdkIntKind(kind: string): kind is keyof typeof SdkIntKindsEnum {
+  return kind in SdkIntKindsEnum;
+}
+
+export function isSdkFloatKind(kind: string): kind is keyof typeof SdkFloatKindsEnum {
+  return kind in SdkFloatKindsEnum;
+}
+
 const SdkDatetimeEncodingsConst = ["rfc3339", "rfc7231", "unixTimestamp"] as const;
 
 export function isSdkDatetimeEncodings(encoding: string): encoding is DateTimeKnownEncoding {