Hybrid power system and control method of hybrid power system

The invention discloses a hybrid power system and a control method of the hybrid power system, the hybrid power system comprises an engine, a motor, a gearbox and a planetary gear train, the engine is provided with an engine shaft, the motor is provided with a motor shaft, and the gearbox is provided with a gearbox shaft; the planetary gear train comprises a planetary gear and the following planetary units: a planetary carrier, a sun gear and a planetary gear ring; the engine shaft is connected with the first of the three planetary units, the motor shaft is connected with the second of the three planetary units, and the gearbox shaft is connected with the third of the three planetary units; the brake is used for braking the planet carrier and the planet gear ring; and a clutch is arranged between the engine shaft and the planetary gear train. According to the scheme, through control of the clutch and the brake, multiple power modes can be achieved on the basis of a simple structure, and the hybrid power syste