Abstract: A fixed crank driving mechanism is provided, and belongs to the field of a crank driving mechanism, including a servo motor provided at one side of a fixed template, where the servo motor is in transmission connection with a rotating shaft, each end of two ends of the rotating shaft is connected with a crank, a tip end of the crank is movably connected with an elbow-shaped transmission arm, the elbow-shaped transmission arm is movably connected with a piston rod of an oil cylinder through a connecting seat, the connecting seat and the oil cylinder are fixedly provided on a movable template, the movable template is movable along guide posts, and one end of each of the guide posts is vertically and fixedly connected with the fixed template. The fixed crank driving mechanism reduces the weight of the movable template and the load of the servo motor.