The supporting base is a cylindrical welding structure, which is also used for bearing all the positive pressure and overturning torque. The lower flange is used for connecting with the cylinders, and the space inside the supporting seat is the channel of the tower for moving up and down. Guide support, maintenance manhole doors are set on the inside wall space, and the upper part of the support is for the installation of elevating drive, cable dram, and parking device.