The solid cartridge igniter was chosen for the ignition of LOX/methane gas generator in comparison with chemical and electric igniter. The parameters of the igniter were set by the calculation formula and experience of designing similar igniters. The time sequence of LOX/methane gas generator ignition was determined according to the characteristic of LOX/methane propellant. Four firing tests of LOX/methane gas generator were performed successfully. There was no sharp pressure peak or temperature peak appeared in the tests. The smooth ignition curve indicated that the ignition scheme was reasonable.