By using photoelectron spectroscopy and X-ray spectroscopy, the decomposition components on the flameout surface of solid propellants were determined and the combustion catalyzed by small quantity of lead or copper compound and carbon were investigated.The experimental results show that the combustion speed can be accelerated by lead salt because of the catalytic effect of the decomposed PbO/Pb which easily bring about formation of carbon on the combustion surface.But the addition of copper compound or carbon black just plays a role of assistant catalysis.