1, high level of education: Shanghai has always had high requirements and standards in the field of education, which requires students' mathematical foundation and ability. Therefore, in order to adapt to this high-level education, the difficulty of the senior high school entrance examination mathematics paper will increase accordingly.

2. Investigation of comprehensive ability: The mathematics test paper of Shanghai senior high school entrance examination not only examines students' basic mathematical knowledge and arithmetic operation ability, but also pays attention to students' comprehensive ability, such as problem-solving ability, logical thinking ability and innovative thinking ability, which increases the difficulty of the test paper.