对于深水中波浪和弱流对三维结构物的作用问题，本文提出了一个适用于高阶边界元应用的新的积分方程。基于小流速下格林函数和速度势的摄动展开，本方法避免了移动脉动源的计算，并将未知量限制在物体表面上，使计算速度大为提高，高阶边界元中的不同类型的柯西主值积分，分别采用间接和直接方法加以计算。 For the effect of wave and weak current on three-dimensional structure in deep water, a new integral equation suitable for higher-order boundary element applications is proposed in this paper. Based on the perturbation of Green’s function and velocity potential under small flow velocities, this method avoids the calculation of moving pulsation sources and limits the unknowns to the surface of the object, which greatly increases the computational speed. Different types of high-order boundary elements Cauchy principal integral, respectively, using indirect and direct methods to be calculated.