In recent years,there are various teaching methods.A single teaching method can hardly meet the in-creasingly diverse learning needs of students.Therefore,multi-mode teaching has emerged.Multi-mode teaching not only meets the personalized needs of students,but also improves students'endogenous learning motivation.This paper conducts the teaching reform of the PLC course,using project-based teaching,VR technology-assisted teaching,and multi-mode integrated teaching methods based on student demand mining and teaching quality evaluation.Project-based teaching can improve students'initiative in learning knowledge and make the teaching content closer to the working environment;VR technology-assisted teaching can avoid the problem that students'vision is blocked and the details of the objects cannot be observed during ordinary physical display teaching;based on student demand mining and teaching quality evaluation,it can realize teaching according to students'aptitude,fully meet students'actual needs,and meet the needs of personalized teaching,and improve students'interest in learning.After using this teaching method,students'final exam scores increased by 8.9%,and the failure rate decreased by 61.1%,with obvious improvement effects.