如何认定交通事故的过错大小,是交通事故责任认定的关键。通过对国内外相关法规的研究,提出了过错程度的概念。对于单项违法行为的过错,介绍了其量化的表示方法和《道路交通安全法》等配套法规对过错程度的部分规定。 How to identify the fault size of a traffic accident is the key to the identification of a traffic accident liability. Through the study of relevant laws and regulations at home and abroad, the concept of the degree of fault is proposed. As for the fault of individual illegal acts, the quantitative methods of representation and some provisions on the degree of fault in supporting laws and regulations such as the “Road Traffic Safety Law” are introduced.