结合等效射线管模型和物理光学法实现了复杂目标高频电磁波多次散射高效且精确的数值求解.在求解射线管的电磁场积分中,选取物体表面为积分区域,详细推导了在物体表面完成的远场积分公式,数值计算结果比前人沿射线管波前积分更精确.计算了几种由平板构成的导体和涂覆介质目标,数值求解结果与已有的实验数据相当符合.该结果可为复杂目标的雷达探测和识别提供理论参考. Combining the equivalent ray tube model and the physical optics method, the multi-scattering of high-frequency electromagnetic waves with complex targets is solved efficiently and accurately.In the electromagnetic field integral of the ray tube, the surface of the object is selected as the integral region, , The result of numerical calculation is more accurate than the wavefront integral of ray tube before.Furthermore, several targets of conductor and coating medium composed of flat plates are calculated, and the numerical results are in good agreement with the existing experimental data. It can provide theoretical reference for radar detection and identification of complex targets.