The hydraulic torque support device is applied to the vertical mill of large building materials machinery and equipment. Its main function is to balance the torque of the pressure frame of the vertical mill, reduce the vibration and impact during the operation of the mill, and improve the running stability and grinding efficiency of the mill. According to the foreign advanced technology and the main problems encountered by many cement plant users in running the vertical mill, the hydraulic torque support device xd200 / 85-so developed by the company has been used in the vertical mill equipment of cement plant, and the basic performance and reliability can meet the requirements of the host equipment. This product can be interchanged with buffers above mps5000b of Pfeiffer vertical mill in Germany and MLS4531 of Shenzhong vertical mill.