Composite is often subjected to various loads (such as impact load) from outside, resulting in fracture, delamination and other damages. Traditional continuum mechanics theory based on partial differential equation is difficult to deal with discontinuous problems such as fracture and damage because it involves space derivation. Peridynamics (PD) is a nonlocal theory based on integral equation. It uses space integration to describe the material function, which has great advantages in dealing with the above problems. But there is "surface effect" in traditional PD methods. That is, when discretizing the material points, the horizon of the material points in the boundary area is incomplete, which will cause calculation errors.