Abstract: In order to evaluate the roadway roof fall hazards from qualitative and quantitative two aspects, through the theoretical analysis, the author identifies five key influencing factors of roadway roof fall, and got the affection weight of five factors by using the analytic hierarchy process (AHP) . A new roadway roof fall hazard extension evaluation model is established based on the extension theory by the matter-element quantitative and dependent function qualitative method, which divided roadway roof fall hazards into levels Ⅰ, Ⅱ, Ⅲ and Ⅳ four levels. Besides, extension evaluation of the Great Wall 1203 transport roadway roof fall hazards has been done with the new extension evaluation model. Evaluation result shows that 4 evaluation places belong to level Ⅱ and 6 places belong to level Ⅲ. At the same time, the deep basis points displacement monitoring results show that the maximal displacement of the roof fall hazard for level Ⅱ is 52 mm and the maximal displacement for level Ⅲ is 230 mm.