Abstract Chemical experiment in primary school science is an important way for students to acquire scientific knowledge. Through the observation and research, it is found that there is an obvious phenomenon of attention dispersion in primary chemistry experiment teaching. The attention dispersion in the process of experimental teaching will affect the cultivation of students' scientific inquiry ability, hinder the acquisition of students' scientific knowledge and the formation of scientific concepts. By observing the class of primary school science and analyzing the video of high-quality class of primary school science from 2012 to 2018, the types of attention dispersion are classified according to the different phenomena of attention dispersion in class. Combined with education target taxonomy, cognitive load theory and attention resource limitation theory, this paper analyzes the reasons of attention dispersion in primary school chemistry experiment teaching, and puts forward countermeasures to solve the problems of attention dispersion in primary school chemistry experiment teaching.
