Immunochromatographic kit for detecting COVID-19 antibody and preparation method thereof

The invention aims to provide an immunochromatographic kit for detecting a COVID19 antibody. The immunochromatographic kit comprises a kit body and an immunochromatographic test strip arranged in the kit body, wherein the immunochromatographic test strip comprises a marking pad and a reaction pad which are in contact with each other; the marking pad is coated with a colloidal gold marked novel coronavirus S protein and a colloidal gold marked chicken IgY antibody; and an M line coated with an anti-human IgM antibody, a G line coated with an anti-human IgG antibody and a C line coated with a goat anti-chicken IgY antibody are arranged on the reaction pad. According to the immunochromatographic kit, an antigen-antibody sandwich method is utilized, a colloidal gold labeling technology is applied to detection of novel coronavirus (COVID19) IgG and IgM antibodies, and then a judgment basis is provided for diagnosis of whether COVID19 is infected or not. The immunochromatographic kit has the advantages of being mor