Abstract: The present invention discloses an antibody capable of binding to human interleukin 4 receptor alpha (hIL-4R alpha) and a preparation method and application thereof. The anti-hIL-4R alpha antibody can specifically bind to hIL-4R alpha, has good effects for inhibiting IL-4 and IL-13-induced cell line proliferation and the like, and can be applied to treatment of IL-4R alpha related diseases, such as immune-mediated inflammatory diseases.