The invention discloses a fuzzy assessment method for explosive detonation performance. The method comprises the following steps of: testing the parameters of detonation heat, detonation velocity and detonation pressure of the explosive by the corresponding method; solving membership values of the parameters of the detonation heat, detonation velocity and detonation pressure of the explosive by taking detonation performance parameters of trinitrotoluene (TNT) as an assessment reference standard and using membership functions; solving the weight values corresponding to the parameters of the detonation heat, detonation speed, and detonation pressure of the explosive by an analytic hierarchy process; and multiplying the membership values by the weight values to obtain a product, namely the assessed value of the explosive detonation performance. The comprehensive assessment of the explosive detonation performance is the premise of designing, developing, preferably selecting and effectively utilizing the explosive, and the necessary basis of assessing the damage efficiency of the explosive and weapon systems. The method is simple and is easy to popularize and avoids complex calculation and tests; corresponding comprehensive index values are obtained by combining the existing data, so that the universal assessment standard can be conveniently formed; and the obtained intuitive results contribute to judging the quality of the explosive detonation performance.