This paper contructs the index system of urban and rural basic public service，the urban-rural coordination degree model and obstacle degree model are used to comprehensively evaluate the urban-rural performance gap and urban-rural coordination degree of sichuan basic public service。According to the data analysis，the overall performance gap between urban and rural areas of basic public services in Sichuan has been gradually reduced from 2008 to 2018，and the four items，including compulsory education，have shown the gap narrowing paths. At the same time，compulsory education and medical care are important barriers to narrowing the gap between urban and rural basic public services，followed by infrastructure and social security. In terms of the whole province，the gap between urban and rural areas in basic public services has entered a stage of high coordination，but compulsory education and medical and health care are still the biggest obstacles and shortcomings to eliminate the effective gap.