A multi-function trainer is provided with a spring assembly and two handle assemblies respectively arranged at a left side and a right side of the spring assembly. The spring assembly includes a spring, and each handle assembly comprises a threaded part and a fitting part. The threaded part includes a shell, and a room is within the shell. The shell includes thread and the thread includes one or more cuttings. The thread can be screwed into one end of the spring. The fitting part is placed into the threaded part.