Ensuring fair and appropriate treatment is an inherent requirement for improving people's health and well-being, and it is also the core aspect for the practice of common prosperity. In September 2021, around the time when the General Office of the State Council issued the "14th Five-Year" Plan on National Healthcare Security, various provinces have also issued their healthcare security plans. This paper sorts out the key measures taken to improve the basic medical security mechanism in each province's "14th Five-Year" Plan on Healthcare Security, and finds that in strict accordance with the requirements of the national treatment security policy, all provinces have clearly established or improved the mutual-aid outpatient security system, consolidated and improved the pooling level of basic medical insurance. Some provinces have further proposed time points for the completion of key tasks. It can be expected that during the "14th Five-Year " Plan period, the standardization and unification of national medical insurance across the country will be comprehensively strengthened, which will effectively alleviate the problem of unbalanced and insufficient development in the medical insurance field, promoting the high-quality development of medical insurance.