Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for handling blockchain-based loan application. One of the methods includes: obtaining a loan application sent by the client device of the loan applicant, wherein the loan application comprises identity information of the loan applicant for identity authentication; determining that the loan application is approvable based on the identity information; performing a loan issuance logic to issue a loan to the loan applicant with a loan amount according to the loan application; and sending a request to one or more blockchain nodes of the blockchain network to store a transaction record of the loan to a blockchain, wherein the transaction record includes the identity information and the loan amount.