The embodiment of the invention provides a data compiling method, relates to the technical field of information processing, and the method can reduce data compiling time to a certain extent. The method comprises the following steps: traversing compiled files in a to-be-compiled project to obtain all initial class files; importing all the initial class files into an intermediate class file with a specified number, wherein the specified number is smaller than the total number of the initial class files; and compiling the intermediate class file to obtain target data. The method and the device are applicable to a computer program project compiling process.