The effects of seven lead salts, including PCDS, PDS, NIP, lead 3-nitro-1,2,4-triazol -5-one, lead 2,4-dihydroxybenzoate, lead phthalate and lead carbonate, on the combustion characteristics of the high energy smokeless modified double-base propellant(HESMDB) was studied in details. The results show that the catalyzed combustion of lead salts relates to the molecular structure of the lead salts. PCDS has the best catalytic effect on the combustions of the HESMDB. Whereas the mixtures of lead salts and carbon black used in the HESMDB, enhance the burning rate of the propellants at low pressure and decrease the pressure exponent of propellant.