Abstract: To reduce unsafe behaviors of miners, based on affective events theory and psychological pressure theory, system dynamics(SD) method was adopted to construct the SD model of influencing factors of miners’ unsafe behaviors from the perspective of affective events. Vensim PLE software was used to conduct dynamic simulation on the mechanism of influencing factors of miners’ unsafe behaviors. The results show that: cognitive level, positive affective events and safety climate can inhibit unsafe behaviors. Psychological stress and negative affective events can promote unsafe behaviors. Therefore, coal mining enterprises should pay attention to the psychological pressure and emotion of miners, and appropriately increasing positive affective events and improving safety climate can effectively reduce unsafe behaviors of miners.