A kit for detecting whether human serum or plasma contains IgG antibodies against parvovirus B19. This type of kit usually adopts the principle of enzyme-linked immunosorbent assay (ELISA). The microplate is coated with recombinant human parvovirus B19 antigen expressed through genetic engineering. After adding the sample to be tested, if the sample contains human parvovirus B19 IgG antibody, it will form an antigen-antibody complex with the coated antigen, and then through a series of chemical reactions and color development reactions, Determine whether the target antibody exists in the sample.