We can use missile-motor matching validate test system to evaluate matching of missile and ramjet motor. It uses short-lived air and gradual start-up main firebox of aeroengine as heater; it starts slowly under the conventional way. In order to start-up in ten seconds, the factors of affecting quickly start-up is analyzed, and every item is optimized. By test, it can prove those optimizations methods are available, coming flow can quickly start-up.