Air temperature testing box

The invention provides an air temperature testing box. The air temperature testing box is characterized by comprising a control system, a box body, and a heater, a refrigerating device, a medium circulation device and an air circulation device which are arranged in an inner cavity of the box body, wherein the medium circulation device is connected with the heater and the refrigerating device respectively; the medium circulation device comprises a sealed circulation tank, a circulation pump and a heat exchanger, which are connected in sequence to form a closed loop; the sealed circulation tankis connected with the refrigerating device; the heater is arranged in the sealed circulation tank and is used for directly heating a medium; the air circulation device comprises a variable frequency draught fan and an air channel plate; the box body is provided with a working region, a working region door, an equipment region and an equipment region door; the heat exchanger, the variable frequencydraught fan and the air c