Abstract: Based on the Jialing Motorcycle JL50QZC, a series of hybrid control systems including the DC brushless motor and LPG engine relied on speed are developed without changing the major structure of the engine.Through the engine performance test, the control parameters of matching the hybrid engine have been optimized.The motor Driving Force-Resistance stable diagram is obtained by calculating, and thus the control parameters which match the hybrid motor is optimized.The control policy of hybrid motorcycle and the velocity point for driving switch by comparison of control parameters with electric engines are acquired.The validity of control policy and the stationarity of driving switch is verified via tests on roads.