20 19 is difficult in mathematics in the college entrance examination. Compared with 20 19, the overall difficulty of the national mathematics paper for the college entrance examination in 2020 decreased steadily. The test questions are closely linked with social reality, and the real situation is designed, which embodies the basic, comprehensive, applied and innovative test requirements, and grasps the stability and innovation well, which will play a positive guiding role in middle school mathematics teaching.