A scaffold for patellar tissue engineering, wherein the scaffold is formed of magnesium, aluminum, zinc and zirconium, wherein the mass ratio of magnesium, aluminum, zinc and zirconium is: 85-95:0-6:0-4:0-4; The shape of the stent is consistent with that of the human patella, and the stent is formed by interweaving trabeculae, and a plurality of holes are formed between the trabeculae. The diameter of the holes is 0.1-0.8 mm, and the porosity of the holes is 30. ~80%. The above-mentioned support has the same shape as the human patella, and can be well matched with the patellofemoral articular surface of the human body or the artificial knee joint, which can reduce the wear of the patella tissue engineering support, thereby reducing the generation of wear debris, and the above-mentioned support The above-mentioned material is used, so the above-mentioned bracket can be degraded in the human body, and metal ions beneficial to the human body, such as magnesium ions, are produced after degradation. Therefore, the above-mentioned bracket does not produce wear debris that is harmful to the human body. In addition, a material for manufacturing the above bracket and a preparation method of the above bracket are also provided.