The ultimate load and the stress around the holes are the main factors leading to the failure of bolted composite plates.Based on Hashin failure criterion and finite element model,the progressive damage finite element model of bolted composite plate was established.Through the displacement load response,the effects of preload,interface friction coefficient and bolted-hole clearance change on the ultimate load were discussed,and the stress distribution rules around the holes under different ply angles were analyzed.The results show that with the increase of preload,the ultimate load of bolted composite plate first increases and then decreases.With the increase of friction coefficient,the ultimate load of bolted composite plate gradually increases.The response of displacement load in the quasi linear stage is basically the same under different pores,and the influence of bolted-hole clearance on the ultimate load is mainly in the slip stage and shear deformation stage.The increase of bolted-hole clearance will reduce the effective contact area between bolt and hole,and affect the pressure distribution and strength of bolt connection.When the direction of fiber ply is in the same direction as the stress component,the change of stress component in this direction caused by external load can be effectively reduced,and the principal stress component reaches the minimum in the bearing area.When the direction of the stress component is the same as that of the fiber ply and there is no external load in this direction,the stress component increases from the bearing area to the non-bearing area with the angle.