Online and offline blended learning is currently one of the main teaching methods in universities.Based on the princi-ple of fuzzy mathematics,this study evaluates the teaching effectiveness of higher mathematics courses in primary education majors at a certain school using a hybrid teaching platform of online and offline advanced mathematics.We determined the eval-uation principles of synchronous consideration between online and offline,overall consideration between teachers and students,and equal importance of process and results;We established an integrated evaluation system with 9 observation points,inclu-ding 3 evaluation indicators before,during,and after class,and set weights for each evaluation indicator and observation point.Finally,a mixed online and offline teaching effectiveness evaluation model based on the principle of fuzzy comprehensive evalua-tion decision-making was constructed.