The invention relates to medical rehabilitation instruments, and in particular, to an artificial hip joint. According to the scheme, the artificial hip joint comprises an acetabular bone, a thighbone and a joint handle; the acetabular bone is composed of an inner acetabular bone layer and an outer acetabular bone layer, and the inner acetabular bone layer is wrapped by the outer acetabular bone layer; and the outer acetabular bone layer is a wear-resistant material layer, and the inner acetabular bone layer is a metal material layer. According to the artificial hip joint, a structure of an existing artificial hip joint is improved, and the structure that the inner layer is wrapped by the outer layer is adopted. In addition, the outer layer is made of quartz material, diamond material, ceramic material or zirconium oxide material, and the inner layer is the metal material layer. By means of the artificial hip joint, the cost is not increased, and the defects of existing products made of single material such as alloy material or metal material are effectively overcome. Compared with existing products made of metal material, the artificial hip joint provided by the invention achieves composite material functions. The outer layer is the wear-resistant material layer, and the inner layer is the metal material layer, so that the wear-resistant characteristic is achieved; and toxic metallic elements are prevented from influencing the health of the human body.