正当防卫是一种阻却违法的正当合法行为。在我国现行的法律制度体系中,和正当防卫有着最直接关系的民法和刑法,在对待正当防卫中有着很大的区别,其中很重要的一个因素就是一般侵权行为与犯罪之间存在的固有差异,这些区别和差异,就使得正当防卫在使用过程中,要分清楚对应的法律,要据刑法和民法的不同特点和使用范围进行,更好的维护自己的合法权益. Justifiable defense is a legitimate and legitimate act that impedes the law. In China’s current system of legal systems, civil law and criminal law, which have the most direct relationship with due diligence, have great differences in treating legitimate defense. One of the most important factors is the inherent difference between common tort and crime These differences and differences make it necessary for the legitimate defense to clarify the corresponding laws in accordance with the different characteristics and scope of criminal law and civil law and to better safeguard their own legitimate rights and interests.