The invention relates to a hybrid power drive system which comprises an engine with a flywheel, a clutch with a clutch cover, a first motor with a stator and a rotor, a second motor, an energy storage device and a reducing mechanism, wherein the engine is connected with the reducing mechanism by the clutch; the energy storage device is electronically connected with the first motor and the second motor respectively; the second motor is connected with the reducing mechanism; and the flywheel of the engine is fixedly connected with the rotor of the first motor by the clutch cover. The hybrid power drive system has simple structure and optimized arrangement, mainly adopts motor drive and can flexibly control the drive system to be in various working modes according to the required power of the drive system and the energy storage condition of the energy storage device so as to meet the requirements of practical running.