This paper introduces the key points to credit rating of corporate credit asset securitization，retail asset securitization，non-performing loan securitization and trust-type ABN，etc.，from the perspective of issuance and credit performance of various types of products in the inter-bank market asset securitization and. With the Chinese economy into the new normal，corporate loan demand declined and the inclusive finance concept concept prevailed and the scale of issuance of securitized products based on corporate credit assets is slowed down，while retail asset securitization products grew rapidly. With the deepening development of asset securitization market，increasingly rich base assets and complex transaction structure design put more demands on credit rating.