Innovative experimental teaching based on research guidance has attracted more and more attentionin the open experimental teaching of undergraduates. lt takes the research on electrochromic properties oltitanium dioxide thin film as an example to integrate the cutting-edge hot spots into the exploratorrexperimental teaching of undergraduates, in order to learn the preparation method of titanium dioxide thin filmand study its electrochromic mechanism.Through the method of open teaching practice ,it can guide students independent initiative and exploration in experiments , broaden the channels for students to acquire scientificxnowledge , and cultivate the exploration ability and scientific research thinking.