The present invention provides a multimodal biometric feature fusion social insurance identity authentication system and method. The system comprises a system body, an automatic focusing camera, a prism, a color selective mirror, an ultraviolet source, an infrared source, a common source, a player, a display screen, a wireless communication module, an identity card reader and a processor. The automatic focusing camera is employed to collect the iris, the face and the fingerprints in the human being biometric features to extract biological features, fuse the extracted biological features into fusion feature information through the processor and bind the fusion feature information with the identity number. The multimodal biometric feature fusion social insurance identity authentication system and method greatly improve the identity authentication safety, improve the efficiency of the database retrieval, and are simple in structure, low in cost, saved in space, low in system complexity and easy to realize.