In the current era，Internet technology is developing rapidly，and the communication methods and communication platforms between people are constantly updated with the development of the Internet. As a kind of network instant messaging method based on smart phones，WeChat has its own characteristics that are convenient，efficient and unmatched by other communication methods. With the integration of WeChat into people’s daily life，it has become an indispensable part of people’s daily life. WeChat chat records have gradually entered the field of judicial practice as evidence of civil litigation. The WeChat chat record is controversial as the validity of the evidence due to the identification of the identity of the party and related issues such as Internet technology. In the current judicial practice，if the content of the WeChat chat record is directly related to the key facts of the case，it can still be used to prove the facts of the case on the premise of solving the authenticity and relevance of the WeChat chat record. Therefore，based on the current judicial practice，this paper studies the practical application of online chat records from the perspective of the Civil Procedure Law，with a view to solving the application rules of WeChat chat records as evidence of civil litigation in judicial practice.