Punching device for two ends of multi-specification pipes

The invention discloses a multi-specification pipe two-end punching device, and relates to the technical field of pipe punching, the multi-specification pipe two-end punching device comprises a base and further comprises middle sliding seats, a first linear guide rail is arranged outside the base, the middle sliding seats are arranged on the first linear guide rail in a sliding mode, and spindle box bodies are arranged on the tops of the two middle sliding seats in a sliding mode; a main shaft is rotationally arranged in the main shaft box body; the connecting discs are arranged on the sides, close to each other, of the two spindle box bodies, one end of each spindle is connected with the corresponding connecting disc, a stamping air cylinder is arranged on the side wall of each connecting disc, and a punching die used for punching a pipe is arranged at the telescopic end of each stamping air cylinder; the fixing mechanism is arranged outside the middle sliding seat and can be used for fixedly clamping a punc