Colloidal gold immunochromatography test paper and immunodetection device

The invention relates to colloidal gold immunochromatography test paper and an immunodetection device, the test paper comprises a bottom plate, and a sample pad, a combination pad, a reaction film and a water absorption pad which are arranged on the bottom plate, and the sample pad, the combination pad, the reaction film and the water absorption pad are in lap joint in sequence; a to-be-detected object labeled antibody labeled by a colloidal gold composite material and a quality control molecule labeled by the colloidal gold composite material are contained on the combination pad, the to-be-detected object labeled antibody can be specifically combined with a to-be-detected target object, and the colloidal gold composite material comprises a carbon nitride nanosheet and colloidal gold nanoparticles loaded on the carbon nitride nanosheet; a quality control line and a detection line are arranged on the reaction film, the quality control line is coated with a quality control molecule capture antibody, and the det