The current test kit is based on specific antibody antigen reaction and immunoassay technique. The test card contains a gold labeled novel coronavirus N protein monoclonal antibody p re coated on the binding pad and a paired novel coronavirus N protein monoclonal antibodies fixed in the test line (T) and corresponding antibodies in the quality control line (C). During the test, the N protein in the specimen binds to the gold-labeled nove lcoronavirus N protein antibody pre-coated on the binding pad, and the conjugate moves upward under the capillary effect, and then is trapped by N protein monoclonal antibody conjugate fixed in the Test Line (T). The higher the N protein content in the specimen, the more conjugates are trapped, and the darker the color of the Test Line (T). If there is no novel coronavirus in the specimen or the virus content is below the detection limit, no colour appears in the Test Line (T). A purple red band will app ear in the Control Line (C) regardless of whether there is a virus in the specimen. The purple red band that appears in the Control Line (C) is the criteria for determining whether there is enough specimen and whether the chromatography process is normal.