The research takes 161 Chinese archives service outsourcing policies as samples, firstly, the organization and issuing process of relevant policies are analyzed. Secondly, based on the theory of policy instrument, a two-dimensional analysis framework is constructed on the basis of types of policy instruments and policy themes, and text coding is carried out. It is found that in recent 30 years, the related policies of archives service outsourcing in China present the characteristics that the types of policies are mainly normative documents and the majority are notice and opinion. In terms of policy contents, the environmental instruments are mainly applied, and the application of supply and demand instruments is relatively few. There are a series of problems, such as too many encouraging statements, shortage of practical regulations, and insufficient attention to topical issues. Finally, it puts forward some suggestions for improving the policies of archives service outsourcing in China, such as strengthening problem-oriented policy deployment, improving whole-process regulatory policies, perfecting policies of promoting enterprise capability, making comprehensive and scientific use of all kinds of policy instruments.