Press machine high in machining precision

The invention discloses a press machine high in machining precision. A base is included. The upper end of the base is fixedly connected with an upper cover plate through two supporting plates. A hydraulic cylinder is fixedly connected to the upper end of the upper cover plate. The two supporting plates are symmetrically arranged on the two sides of the lower end of the hydraulic cylinder. The telescopic end of the hydraulic cylinder penetrates through the upper cover plate and is fixedly connected with a punching head. The lower end of the punching head is fixedly connected with a punching buffering device. The two sides of the punching head are symmetrically provided with guiding columns corresponding to the punching buffering device in position. The upper ends and the lower ends of the two guiding columns are fixed to the opposite side walls of the upper cover plate and the base correspondingly. The press machine is compact in structure, the punching buffering device is arranged at the lower end of the punc