With the development of the internet and information technology,online and offline blended teaching that combines traditional teaching methods with modern information technology has become a trend.In response to the problems in the teaching process of analytical chemistry,a blended teaching model based on the mosoteach platform is constructed.Taking the Introduction to Titration Analysis as an example,this article elaborates on the application of blended online and offline teaching in analytical chemistry from three aspects:preschool analysis,teaching process,and evaluation methods.The aim is to cultivate students'active learning and exploratory thinking abilities,improve the teaching quality of analytical chemistry,and provide a way to cultivate high-quality talents.