The utility model belongs to the field of electric vehicles, and particularly provides an electric vehicle and a thermal management system thereof. The utility model aims to solve the problem that theendurance mileage of the electric automobile is influenced due to high power consumption of the conventional air conditioning system of the electric automobile during heating in winter. Therefore, the thermal management system comprises an air conditioning system, a battery thermal management system, a motor thermal management system, a first heat exchanger, a second heat exchanger and a controlvalve, wherein the first heat exchanger is provided with a first channel and a second channel; the second heat exchanger is provided with a third channel and a fourth channel which are independent; the first channel and the third channel are connected into a loop of the air conditioning system in series, and the second channel and the fourth channel are connected into a loop of the battery thermalmanagement system and a loop of the motor thermal management system in series. The control valve enables a circuit of the battery thermal management system and a circuit of the motor thermal management system to be connected in series. The heat management system with the structure can absorb waste heat generated by the power battery and the motor, and power consumption of the electric automobileis reduced.