Asphalt mixture fatigue loading device capable of simulating sudden change of ambient temperature

The invention relates to an asphalt mixture fatigue loading device capable of simulating the sudden change of ambient temperature. The device comprises an environmental box and a test piece bearing plate which is arranged in the environmental box and can slide back and forth along the horizontal direction, wherein the environmental box is divided into a high-temperature environmental box and a lower-temperature environmental box by means of a thermal insulation board; the high-temperature environmental box and the lower-temperature environmental box are separately provided with a loading wheelwhich can apply pressure toon a test piece to be tested and can slide back and forth along the horizontal direction; the loading wheels are positioned above the test piece bearing plate and are connected with a first power device respectively by means of a force transmission rod; the thermal insulation board can be rotated to a state that the bottoms of the thermal insulation board is loading wheels and at the position h