Objective: To analyze the current situation of teaching environmental sanitation in primary and secondary schools in Sichuan Province from 2017 to 2021, and to provide basis for the development of teaching environmental sanitation intervention measures in Sichuan Province. Methods: A total of 7 510 primary and secondary schools were supervised and sampled from 2017 to 2021 according to the unified questionnaire. Descriptive statistical analysis method was used to analyze the monitoring results. Results: The overall pass rate from 2017 to 2021 is only 51.70% (3 883), a total of 2 282 were sampled in 2017 and 1 414 were qualified, with the pass rate was the highest (61.96%),a total of 1 768 were sampled in 2019 and 750 were qualified, with the lowest pass rate (42.42%). The pass rate of different testing items in each year from 2017 to 2021 and the pass rate of the same test item in different years from 2017 to 2021 were statistically significant ( P <0.05). A total of 2 095 samples were inspected in rural areas in five years, and 1 177 were qualified, with the highest pass rate (56.18%). In urban areas, a total of 2 124 samples were inspected in five years, and 1 040 were qualified, with the lowest pass rate (48.96%). In the five year period of primary school, a total of 4 867 schools were sampled, and 2 626 were qualified, with the highest pass rate (53.93%). There were statistically significant differences in the qualification rate of desks and chairs, classroom lighting, blackboard illumination, per capita area of classrooms, and per capita area of student dormitories in different regions ( χ 2=9.87, 17.51, 37.69, 75.43, 11.22, P ＜0.05), and there were statistically significant differences in the pass rates of classroom lighting, per capita area of classrooms, per capita area of student dormitories, and ventilation of classrooms and student dormitories between different school sections ( χ 2=9.16, 39.37, 79.56 , 31.37, P <0.05). Conclusion The teaching environment of primary and secondary schools in Sichuan Province needs to be improved continuously, the qualified rate of classroom lighting and desks and chairs is low, and the investment in weak links should be increased.