作为一种强磁场环境下的新概念动能**，电磁轨道炮利用脉冲电磁力可加速宏观物体到超高速。然而，其导体内脉冲电流分布是不均匀的，严重时会影响轨道炮发射威力或发射可靠性。针对一种薄带状铜导体结构的复杂电磁轨道炮，根据导体内电流分布的邻近效应原理，提出了在铜导带两侧附加了铁护层的均匀电流方法，并建立了物理模型，利用商业软件对该模型进行了数值仿真，仿真分析结果表明：铁护层的加入，大幅提高了铜导体内电流均匀分布程度，提高了铜导体承载电流的能力。

As a kind of new concept kinetic weapons in strong magnetic environment, electromagnetic railgun can accelerate macro projectiles to hypervelocity using the electromagnetic force. However, the current distribution in conductors of railguns is sharply uneven, which may affect the system efficiency or the launching reliability. In this paper, as for a kind of complex railguns with copper strips, according to proximity effect about current distribution in conductors, two iron sheathes were added to the sides of the copper strips. A model was proposed, and simulation on current distribution was performed. The simulation results showed that the current in the copper strip was much evenly distributed. All these results are significant to current-carrying capacity of conductors and railguns engineering development.