Low-temperature storage chamber with purification function

The invention provides a low-temperature storage chamber with a purification function. The low-temperature storage chamber comprises a closed heat insulation space defined by cold storage wallboards (1) and a heat insulation floor (10). In the heat insulation space, filtration air supply units (5), a refrigerating house top plate (8), refrigerating house side wallboards (9) and the heat insulation floor (10) define a refrigerating and cleaning space. The lower portions of the refrigerating house side wallboards (9) on the two sides of the refrigerating and cleaning space are provided with ventilated air return grilles (7). The two sides of the portion above the refrigerating house top plate (8) are provided with a first evaporator set (2) and a second evaporator set (3) correspondingly. An air supply passage (4) is formed between the refrigerating house top plate (8) and the cold storage wallboard (1) of the top of the heat insulation space. Air flowing upwards from an air return passage passes through a midd