Focusing on the research of the UV coverage situation on the OAS telescope, this paper introduces the concept of UV coverage technology in the OAS imaging technology and the two statements of real-time UV coverage and none real-time UV coverage. It also researches the UV coverage approach with four small telescopes to compose an OAS telescope. It takes an actual observed object as an example to increase the optimization to the UV coverage method. Meanwhile, it also raises the method of revolving aperture to increase and optimize the UV coverage and proposes the project of the optimization for sub-aperture arrangement of the OAS telescope. The result of the UV coverage optimization is also acquired, and a living example is given, which is the simulation of an OAS telescope with UV coverage technology and sub-aperture arrangement optimization.