Based on the stress analysis of the tension-type prestressed anchor cable, it is pointed out that the free section of the tension-type anchor cable in rock mass and soil should go deep into the imaginary sliding surface of 1 ~ 2m and 2 ~ 3m respectively, and it is suggested that a 50 cm long free section should be kept at the opening of the full-length anchor tension-type anchor cable to reduce the shear stress caused by temperature change. In view of the rheological displacement of weak rock mass and the late displacement caused by tension, stress transfer after locking and energy dissipation of broken rock mass, it is suggested that the pressure distributed cable compensation tension should be added to the construction code of prestressed anchor cable. Finally, the structure of the new high anticorrosion anchor cable of Liuzhou OVW Company is introduced.