An innovative igniter based on catalytic decomposition of H₂O₂ was designed and manufcatured. With this igniter, an H₂O₂/HTPB hybrid rocket engine was tested. The experiment results demonstrate that this new igniter can successfully start the H₂O₂/HTPB hybrid rocket engine with combustion stability and good performance. The experiment results also show that the combustion efficiency will achieve the highest level when the hybrid ratio deviates from the best ratio of oxidizer.