Abstract: To reduce accidents in coal mines, in view of the people’s unsafe behavior problems, the unsafe behavior of coal miners is controlled by BBS behavior safety observation method. BBS behavior safety observation, safety behavior theory, unsafe behavior and their influencing factors were analyzed by searching for documentation, field investigation, behavior analysis and so on. Based on the DuPont Bradley curve, the Bradley curve model for coal mine was obtained, and the BBS behavior safety observation methods were implemented. Then, during and after observation, the corresponding behavior correction and improvement measures were proposed to control unsafe behavior. The results show that the BBS behavior safety observation method based on Bradley curve and its full application in coal mine unsafe behavior control can play an important role in curbing coal mine accidents and provide a practical and effective scheme for coal mine safety management.