Abstract: The "double reduction" policy is to ease the burdens of excessive homework and off-campus tutoring for students undergoing compulsory education.Although it has a significant impact on easing students' academic burden,whether it affects students' academic performance has become a wide concern in society and for parents.To investigate whether and how the "double reduction" policy affect students' academic performance,Tukey's multiple comparison test was conducted on the final exam scores of 30 primary schools in Zixing City,Hunan Province from the first semester of 2021 to the first semester of 2022.The research results indicate that the "double reduction" policy has a significant negative impact on the academic performance of the fourth-grade students and a significant positive impact of the fifth-grade students;the impact on the subsidiary courses is significantly higher than that of main courses;and the impact on the academic performance of sixth-grade students is significantly lower than that of other grades.Therefore,under the background of the "double reduction" policy,we should strengthen the guidance of memory related subjects for the fourth-grade students,pay attention to the balance of class hours between different subjects,and give particular emphasis on the stress reduction and burden reduction of the sixth-grade students.

Key words: "double reduction" policy, academic performance, multiple comparison test