When the Fiber Reinforced Polymer/Plastics (FRP) bars or cable are applied to the cable system of cable bearing bridge, the bonded anchorage and the clip anchorage have their own limitations. According to the characteristics of common cable anchorage system, combined with the research results of FRP bar clip anchorage and bond anchorage, the composite anchorage of FRP bar was proposed. The composite anchorage consists of a wedge anchorage at the rear and a bonded anchorage at the front. The wedge anchorage part includes an anchor cup, a clamp with concave teeth, an aluminum sleeve and a plastic film, and the bonded anchorage part includes a steel sleeve and Reactive Power Concrete (RPC), the bonding medium. The effects of the length of anchor cup, the length of steel sleeve, the pretension force of clip and the pretension force of reinforcement on the anchoring performance of composite anchors were studied by static load test. The results show that the maximum limit load in the composite anchorage specimens is 208kN, and the corresponding anchoring efficiency coefficient is 104%, greater than 95%, which meets the requirements of the code. The reasonable combination of anchoring length of the two anchoring forms of composite anchorage is as follows: for no pretension anchorage, the length of the anchor cup is 40mm and the length of the bond anchoring is 100mm; For pre-tensioned anchors, the length of anchor cup is 60mm and the length of bonded anchorage is 60mm. The calculation formula of ultimate load of the composite anchorage has good applicability.