Abstract :As a core technique for the US military's layout of the aerospace battlefield, the Starlink system will likely subvert the current operational model and break the balance of major powers by penetrating reconnaissance, command, striking, assessment, support and other operational links. This paper has reviewed the basic attributes, development status and capability characteristics of the Starlink system, analyzed its future operational application model referring to the Russia-Ukraine conflict cases, evaluated the threat of Starlink under the future aerospace situation, and proposed targeted new aerospace defense technology. It thus provides the references for the construction of aerospace security under the impact of Starlink. Key words Starlink system communication satellite constellation military application aerospace defense technologies