Abstract: Aiming at the complexity of coal mine safety evaluation,extension superiority evaluation method is used in coal mine safety evaluation.On the basis of integrating coal mine actual situation and relevant documents,the paper proposes the evaluation indexes and divides the risk grade of coal mine,and establishes the extension superiority model of coal mine evaluation according to the matter-element and extension theory.Taking a mine in Guizhou province as an example,the feasibility of coal mine extension superiority evaluation method is tested and verified,and the evaluation result more clearly reflects the level of coal mine safety.