In traditional summative assessment, according to the original score accumulation method, it is difficult to reflect the hierarchical nature of the questions under the same question type, and students often have the same score, which unilaterally reflects the real level of students and other defects. This paper adopts intuitionistic fuzzy TOPSIS. First of all, the weight set of corresponding indicators is determined by AHP, then the membership degree fuzzy matrix is determined by intuition fuzzy set through expert assessment, and the closeness degree is determined by TOPSIS decision‐making method. Finally, students' scores are weighted. The feasibility of this method in educational assessment is verified by taking the mathematics quiz results of some students in a senior middle school in Jiangsu Province as an example. The results show that the calculation of intuitionistic fuzzy TOPSIS is simple and practical, and the assessment results are relatively consistent with the actual situation. In the future educational assessment, this method can be extended to the selection of talents in multi‐disciplines or comprehensive disciplines.