The emergency rescue capability of coal mine water penetration is of great significance for the prevention and emergency rescue of coal mine water penetration accidents. There are many factors affecting the emergency rescue capability of coal mine permeation, and each factor has certain ambiguity and uncertainty, which makes it difficult to obtain reasonable index weights in safety evaluation. Accordingly, a combination weighting method is given in this paper, and a decision model is established by introducing the Lagrange function. The Euclidean distance function is introduced to establish the relationship between subjective and objective weights and preference coefficients. A more reasonable combination weight is obtained by analytic hierarchy process and Entropy weight method, and applied to fuzzy comprehensive evaluation. The proposed combined weighting-fuzzy comprehensive evaluation model was used to evaluate the emergency rescue ability of water penetration in a coal mine in Heilongjiang, and the evaluation result was "excellent", which was in line with the actual situation of the project. The results show that the combined weighting can obtain a reasonable index weight of the emergency rescue capability of coal mine water penetration accident, understand the problems existing in the emergency rescue, so as to improve the index affecting the emergency rescue capability in a targeted manner; The fuzzy comprehensive evaluation model based on combination weighting has good scientificity and accuracy, and has good engineering application value.