ObjectiveTo study the effect of self ilium periosteum free state transplantation on curing femoral neck fracture. Methods 7 ordinary adult beagles, 14 hip joints in all, were for animal models of femoral neck fracture. After fixation, self ilium periosteum was stuck to the fracture surface with protein adhersive. Observation was with naked eyes and by X -rays and pathological section observed under microscope. ResultsOne month later, X -ray showed that the fracture line blured, transplanted periosteum grew with femoral neck. Under microscope, blood capillary in the periosteum increased sharply. Cartilage and bone like matter were seen. Three months after operation, X -ray showed that fractures was united, a lot of bone matter were seen where the periosteum was transplanted. Under microscope, developed blood vessel net in the periosteum and lots of bone cells were seen, new bone trabecula growing into the original ones in the femoral neck and united with them. ConclusionsFree state transplanted self ilium periosteum can survive and help bone reunit with the blood vessel net reconstructed. It is a feasible and easy way to cure femoral neck fracture.