Acquired immune deficiency syndrome virus and treponema pallidum fusion protein as well as preparation method and application thereof

The invention provides acquired immune deficiency syndrome virus and treponema pallidum fusion protein which can be used for preparing GICA (Gold Immunochromatographic Assay) one-step double-combined acquired immune deficiency syndrome and syphilis antibody rapid detection test paper, simultaneously and jointly detecting acquired immune deficiency syndrome and syphilis viruses, simultaneously carrying out combined detection on two diseases and carrying out result reading by naked eyes without special instruments, thereby providing a convenient, rapid, accurate and cheap detecting method for the site rapid detection, such as blood center street compulsory blood donor screening, family self-help detection, disease screening for frontier port exit and entry people, and the like, site epidemiology investigation and other mechanisms needing rapid detection.