There are three levels: elementary, intermediate and advanced. The difficulty level of common sense practice in primary schools refers to the classification of the difficulty level of common sense in primary schools. The primary difficulty mainly includes the knowledge content of the first and second grades of primary school, such as basic Chinese, mathematics, English, science and other knowledge points, and the difficulty is relatively low, mainly based on mastering basic knowledge, while the intermediate difficulty mainly includes the knowledge content of the third and fourth grades of primary school, such as Chinese reading comprehension, mathematical application problems, English listening and oral expression. The difficulty is moderate. Students are required to have certain thinking ability and application ability. The advanced difficulty level mainly includes the knowledge content of the fifth and sixth grades of primary school, such as Chinese composition writing, complex calculation and problem solving of mathematics, English reading and writing, etc. It is difficult and requires students to have strong thinking ability and comprehensive application ability.