Abstract: In order to explore the internal relation of mechanical and electrical accidents in coal mine from the perspective of human factors, a method of mechanical and electrical accidents analysis is proposed, which integrates human factors analysis and classification system and complex network. Firstly, an improved human factors analysis and classification system is used to identify the cause of the accident and the cause chain, and the cause network is constructed. Secondly, the key causes are identified after the standardization of each index, and the disaster rate and vulnerability are introduced to identify the key cause chain. Finally, the evolution path of unsafe behavior is constructed. The results show that the network has the characteristics of small world, and the chain effect between the accident causes is obvious. The key cause of the accident is insufficient organizational safety supervision and mechanical and electrical management disorder, the key cause chain is poor individual safety awareness caused by insufficient safety education, and organizational factors are the source of the evolution path of unsafe behavior of miners.