As the current unemployment insurance system has not yet fully enabled the realization of the basic goal of protecting the economic security of workers, it is urgent to have its regulatory space expanded. Hence, the introduction of unemployment prevention function into the traditional unemployment insurance system is an optional path to further guarantee the realization of workers' economic security. It is evident that the dismissal protection system in the labor law and the lack of partial unemployment benefi ts in the traditional unemployment insurance system constitute the real demand for introducing the function of unemployment prevention; the theory of social solidarity and externality constitutes its theoretical foundation; the articles of labor rights and social security rights stipulated in the Constitution are its legislative basis. In the light of China's specifi c national status, the introduction of the function of preventing unemployment in unemployment insurance should take partial unemployment subsidies as the main form of benefits and vocational skills subsidies as the supplementary form of benefits. The introduction of industry experience rate system can be considered in the future. On this basis, the legislative concept of maintaining workers' human dignity should be established as the core, with subsidiarity and non-core as the positioning rules, and the design of related rules and regulations should be strengthened.