在高斯光束传输理论基础上，推导出求解偏振无关楔（Ｗｅｄｇｅ）型光隔离器插入损耗与反向隔离度的数学解析表达式；得出了采用不同材料隔离器的插入损耗、反向隔离度与双折射晶体倾斜角度及双折射晶体和旋转晶体间距的关系曲线；分析了影响光隔离器插入损耗、反向隔离度的因素。实际测量结果与理论分析相吻合。 Based on the theory of Gaussian beam transmission, a mathematical analytical expression for solving the insertion loss and reverse isolation of a polarization-insensitive Wedge optical isolator is deduced. The results show that the insertion loss, the reverse isolation And the birefringent crystal tilt angle and the relationship between the birefringent crystal and the rotating crystal spacing. The factors affecting the insertion loss and reverse isolation of the optical isolator are analyzed. The actual measurement results are consistent with the theoretical analysis.