Abstract According to the curriculum requirements and the present situation of teaching and learning, this paper pointed out 3 core questions in the teaching of double decomposition reaction in junior high school. According to junior high school students' cognitive level and psychological development characteristics, combined with teaching practice summary, this study summed up the targeted teaching strategies such as constructing the concepts of three kinds of materials, further understanding the learning progressions with three stages and judging the conditions with two angles, which could help students to understand the driving force of double decomposition reaction, and to break through the key points and difficulties in the study, so as to promote the students to form the concept that the material could be transformed under certain conditions.
