Hybrid drive system and vehicle

The invention discloses a hybrid drive system and a vehicle. The hybrid drive system comprises an engine, a transmission, a coupling device, a main reducer, a generator, a battery and a first drive motor, wherein the transmission and the generator are respectively connected with the engine; the generator and the first drive motor are respectively connected with the battery; the coupling device comprises a plurality of input shafts and an output shaft for receiving torque transmitted by the input shafts; the input shafts comprise a first input shaft and a second input shaft; the first input shaft is connected with the transmission and the second input shaft is connected with the first drive motor; the output shaft is connected with the main reducer; and the engine and the output shaft are in a connection state or a disconnection state. The hybrid drive system is capable of coupling the power of the engine and the first drive motor by means of the coupling device, thereby overcoming the problem in the prior art that the demand for power and torque can not be satisfied when the demand for output torque changes due to a change of traveling working condition.