Tunnel anchors are ideal for large suspension Bridges in mountainous areas because of their high cost performance and low environmental disturbance. The prestressed pipe of the tunnel anchor is generally equipped with a bending beam steering part. For an unbonded replaceable anchor filled with grease in the pipe, a steering device composed of a splitter pipe is provided in the bending beam steering part. Compared with the straight pipe, the existence of the steering device makes it more difficult to thread, fill and seal the pipe. In this paper, an experimental study on the simulated construction of prestressed anchor with bent beam is carried out for Aizhai extra-large suspension bridge in Hunan province. The feasibility of the beam threading process is tested through the beam threading test, and the test shows that the beam threading is smooth and the steel strand will not be twisted during the beam threading process. The feasibility of cable changing process is verified by cable changing test, which shows that single cable changing can be realized smoothly. The feasibility and sealing effect of the oil filling process were tested by the oil filling sealing test, which showed that the hole could be filled smoothly and the system had no leakage. The experience accumulated through the simulation test provides reference for the practical project and the similar projects in the future.