The hanger is connected to the tail pipe string and lowered to the sitting position. A pressure holding ball is inserted from the wellhead, and when the ball falls to the pressure holding support seat, the pressure is held from the wellhead. The pressure difference between the inside and outside of the pipe is formed, and the piston is pushed down to cut the hydraulic cylinder shear nails, driving the slips to move up along the cone and close to the inner wall of the upper casing. At this time, the pipe string is lowered to make the slips stuck on the casing wall, achieving tail pipe suspension. After sitting and hanging, pressurize and hold the ball seat to open the circulation channel. The reverse connection between the forward rotating drill string and the hanger is used to achieve the loss of the tail pipe after cement injection.