This test kit uses recombinant Spike antigens of the SARS-CoV-2 and goat anti-mouse IgG polyclonal antibodies that are respectively immobilized on a nitrocellulose membrane. It uses colloidal gold to label recombinant Spike antigens of the SARS-CoV-2 and mouse-IgG. Using nano-colloidal gold technology and applying highly specific antibody-antigen reaction and immunochromatographic analysis technology principle.