The invention proposes a method and device for generating serialized and deserialized APIs (Application Programming Interface). The method comprises the following steps: generating a basic developmenttemplate library according to a SomeIpXf specification, wherein the basic development template library comprises a first API pair used for performing serialization and deserialization processing on afirst part of a SomeIpXf message, and each second API pair used for performing serialization and deserialization processing on data of each basic data type; and according to the basic development template library, generating each third API pair used for performing serialization and deserialization processing on data of each complex data type, and each fourth API pair used for performing serialization and deserialization processing on data of each remote procedure call type. The method and the device provided by the invention can be used as a reference for generating the serialized and deserialized APIs of structured data, and the development efficiency of the SomeIpXf can be improved when the method and the device are applied to the SomeIpXf development.