Scaling method is a means by which studies are conducted on a similar model instead of a direct study of the natural phenomenon or process itself. It is important to be able to choose the appro-priate scaling method to best match the results between full-scale and sub-scale experiments. On the basis of a brief introduction to scaling method,the major existent scaling methods of railgun physical fields,projectile dynamics,circuit and their relative merits are elaborated on. The current research difficulties and the potential research directions are discussed at the end of the paper. It turns out that not all quantities can be matched according to the existent nonideal scaling method. Therefore,choo-sing the appropriate quantities and scaling method according to the specific requirements is an effective way in practical applications.%模化方法是指不直接研究自然现象或过程的本身，而是用与这些自然现象或过程相似的模型来进行研究的一种方法。选择合适的模化方法对原型与模型之间试验结果的匹配至关重要。在对模化方法进行简要介绍的基础上，对现有电磁轨道炮物理场、弹丸动力学、驱动电路模化方法的实现方式和优缺点进行了论述，探讨了当前电磁轨道炮模化方法的研究难点及未来可能的发展方向。目前尚未出现一种理想的电磁轨道炮模化方法可以同时进行所有物理量的匹配，因此，在实际应用过程中，根据具体需求选择合适的物理量和模化方法是目前较为有效的研究途径。
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