Abstract: Practical courses account for a large proportion of the total curriculum in the training program for application-oriented undergraduate professionals. The quality of practical teaching directly affects the development of students' comprehensive quality. Taking student satisfaction as the goal, based on constructivism theory, an evaluation system for the quality of practical teaching is established from four aspects: the process of practical teaching, teachers, environment and supervision. In view of the subjective uncertainty of the respondents in the questionnaire and the fuzzy belief of qualitative indicators, the probabilistic linguistic set theory is introduced to calculate the weight of indicators based on the best worst method (BWM). Finally, based on the multi-attribute boundary approximation area comparison method (MABAC), a new method for evaluating the quality of probability language MABAC practice teaching is proposed. The experimental results show that the proposed method can effectively deal with the fuzzy uncertainty in the process of teaching evaluation, provide a reference for scientific evaluation of the quality of practical teaching, and help improve the quality of teaching and improve students' satisfaction.