Hybrid power automobile gearbox unit cooling system and cooling method

The invention provides a hybrid power automobile gearbox unit cooling system and cooling method. An oil incoming pipe, an oil discharging pipe and a returning pipe communicating the oil incoming pipe and the oil discharging pipe are arranged in an oil cooling temperature control valve unit, the oil temperature sensing information of a gearbox unit is combined, and valves of oil pipes are controlled to open and close dynamically; on the idling condition, oil from the gearbox unit flows back to the gearbox from the oil cooling temperature control valve unit directly, time for the oil flowing back the gearbox is shortened, oil pressure can be established rapidly, and the gearbox and a coupled mechanism thereof operate at the proper temperature rapidly; when an engine operates in high speed and the gearbox is under high load, oil friction heat is increased sharply, oil of the gearbox flows to an oil cooler completely through the oil cooling temperature control valve, waste heat is radiated through the oil cooler, and the coil flows back to the gearbox unit, so that the accurate control of the oil temperature of the gearbox is implemented, friction loss, oil consumption and discharging are reduced, service life of the gearbox unit is prolonged, and shift quality is guaranteed.