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The present application relates to a kind of thermal management system and its control method, specifically, a kind of AMT clutch thermal management system and the control method of the thermal management system.The system includes temperature sensor, signal interface, gearbox controller, heat exchange module, electric water pump and engine cooling system;Temperature sensor is installed on clutch pressure disc, and the output end of temperature sensor is electrically connected with the input end of gearbox controller by signal interface installed on clutch actuator;Heat exchange module is installed on the inner side wall of clutch shell, and the output end of engine cooling system is communicated with the input end of heat exchange module, and the input end is communicated with the output end of heat exchange module;Electric water pump is installed on the output end of engine cooling system, and its control end is electrically connected with the control end of gearbox controller.The present application can quickly heat or cool clutch pressure disc, keep clutch transmission torque characteristic at a stable value, and ensure the running state of vehicle.