The cylinder support of high and low pressure cylinders is mainly used to support the upper cylinder of the high and medium pressure cylinders and low pressure cylinders of the steam turbine, making it easy for maintenance personnel to enter the cylinder for maintenance. The cylinder support is designed in a cylindrical shape, and the diameter of the cylinder is basically within the range of Φ 350~ Φ 400mm, with a height between 400mm and 1000mm. Rubber plates are pasted on both the top and bottom of the cylinder support to protect the cylinder surface. The height of each cylinder support is consistent to ensure the stability and safety of the supporting cylinder.