The combustion performance of combustible cartridges with different formulations and mixed charges with different proportions is studied by means of closed explosion container test, and the interior ballistic performance and burnout performance under different propellant and combustible cartridge case proportions are studied by means of interior ballistic performance test. The test results show that the appropriate proportion of energetic fiber can improve the burning rate and mechanical properties of the cartridge case, and the combination of 3/7-single as the main charge with the combustible cartridge case can effectively improve the internal ballistic performance and burnout, and can improve the accuracy of the internal ballistic model.