In order to alleviate the problem of safety and normal production due to the failure of coal mine electromechanical system, 17 evaluation indexes affecting the reliability of coal mine electromechanical system are determined from four aspects of human, machine, management and environment, and the reliability evaluation system of coal mine electromechanical system is constructed. A reliability coupling evaluation method of coal mine electromechanical system based on improved fuzzy analytic hierarchy process and improved entropy weight method is proposed, and applied research is carried out in Wangjiazhai Coal Mine in Guizhou. The research results show that the coupling evaluation method has good applicability to the reliability evaluation of coal mine electromechanical system. Combined with the calculated index weight value and single score result, it can guide the improvement direction of coal mine electromechanical system reliability, which is of great significance to improve the reliability of coal mine electromechanical system and promote safe and normal production.