Multifunctional profile pipe fitting punching equipment and punching and cutting-off method

The invention relates to the technical field of pipe machining equipment, in particular to a pipe punching and cutting-off method which comprises the following steps of pipe conveying, pipe tailing cutting-off, pipe punching and cutting-off, pipe reverse conveying and pipe discharging. The punching die comprises a fixed die detachably installed on the top face of the punching machine base. The movable mold is arranged at the top of the fixed mold; the movable die driving piece is arranged on the blanking machine base; the cavity is formed in the middle of the fixed mold; the positioning punch is fixed on the bottom surface of the movable die; the shear knife is fixed on the bottom surface of the movable die and close to one side of the positioning punch; the multifunctional profile pipe fitting punching equipment comprises a movable die, a fixed die and a guide assembly arranged between the movable die and the fixed die, the output end of the movable die driving part is assembled with the top face of the mova