In view of traditional beam pumping unit has many limitations in its structure and working principle, the machine of pumping unit is designed with an innovative design scheme without pumping beam. According to the principle of classical mechanical balance, it was utilized the innovative use of variable torque counterweight mechanism with good bending performance of flat steel wire rope instead of the traditional round wire rope as the pumping unit pull rope, by the belt drive and gear reducer to complete the first and second motor deceleration, and it was used the classical mechanics to balance the principle of force to complete the output of the output torque to assist the role of torque. In order to reduce the average power of the motor and space in exchange for efficiency, it is to achieve the purpose of energysaving emission reduction.