The effect of several combustion catalysts,such as energetic lead salt B,aromatic acid lead salt C,aromatic acid copper salt B,carbon black CB₁ or CB₄,on the combustion behavior of screw-compressed Al-RDX-CMDB propellants was investigated when they were used alone or as a combination of two or three of them. The experimental results show that both energetic lead salt B and nonenergetic aromatic acid lead salt C are able to increase the burning rate and decrease pressure exponent of the propellants when they are respectively used together with copper salt and carbon black.The catalytic activity of energetic lead B is higher than that of aromatic acid lead salt C.The reason is that the thermal decomposition product PbO of energetic lead salt B has a higher catalytic activity than the later's.