The invention relates to a method for preparing a sodium hyaluronate and KGM (Konjac glucomannan) porous bracket material used in cartilage defect repair, belonging to the field of biomedicine materials. The invention adopts two materials, namely sodium hyaluronate and KGM. Through utilizing different proportions and the crosslinking of KGM, the sodium hyaluronate and KGM porous bracket material is prepared through adopting a freeze-drying method. The invention has mild reaction conditions, simple steps, and low cost; human body bone mesenchymal stem cells are uniformly distributed in the bracket material and can grow and reproduce well; and the aperture, the pore rate, the compressive strength, the hygroscopic coefficient, the degradation rate, and the like of the bracket material can be regulated through regulating the contents of the sodium hyaluronate, the KGM, and a cross-linking agent, as well as the freeze drying conditions, so as to get the porous bracket material meeting requirements. The material can be used in the cartilage repair field.