The invention provides a hybrid power drive system. The system comprises an engine, a first motor and a second motor which are electrically connected with a battery unit, a speed variator, a first clutch, a second clutch and a transmission shaft, wherein, the engine, the speed variator, the first motor, the first clutch and the second clutch are connected with the second motor in sequence, and the transmission shaft is connected between the first clutch and the second clutch. Because the speed variator is arranged between the engine and the first motor, the problem of the matching of the rotating speed between the engine and the motor can be solved. When a whole vehicle is moved in high speed, the engine can perform better matching of the rotating speed with the first motor and/or the second motor through the speed variator, to ensure the three parts to be moved in parallel or in series, thereby the whole vehicle can still have better accelerating ability under the high speed condition.