The invention discloses a non-magnetic environment high-low temperature test system, including a non-magnetic test cabin, a temperature control chassis, and a non-magnetic return air pipeline for circulating connection of the two. The temperature control chassis is provided with an air supply fan, a turbulence fan, a heating device, a liquid nitrogen spray device and a discharge device. The liquidnitrogen spray device and the heating device are used for raising and lowering the temperature of nitrogen gas in the system. The air supply fan is used for sending temperature-controlled nitrogen gas to the non-magnetic test cabin. When the internal pressure exceeds a certain value, discharge is performed through the discharge device. The system of the invention can simulate a non-magnetic high-low temperature environment in the non-magnetic test cabin, and can be used for high-low temperature magnetic characteristic calibration of magnetometers and other loads.