The invention discloses an anti-copy detection method for SolidWorks files and aims to solve the technical problem of poor practicability caused by complexity of the conventional anti-copy detection method for files. The technical scheme is that whether a file is obtained through copying is determined through the following steps: reading characteristic attribute information of all SolidWorks files in a folder sequentially; then performing comparison to determine whether creation time is identical, whether characteristic forming time is quite short, whether characteristic creating date is in a homework setting time interval and whether personal information is correctly input during file creation. According to the method, SolidWorks file copying is detected in two ways, for the first way, information extraction and comparison are performed for multiple copying ways, and the file obtained through copying is screened out; for the second way, the same information is detected and compared for the multiple copying ways. Homework checking vigor of a teacher can be saved, all homework copying files can be screened out, and the practicability is good.