The recovery time after femoral head necrosis surgery is related to the treatment methods, such as hip preservation therapy and total hip replacement surgery, the details are as follows: 1, hip preservation therapy: for example, moderate femoral head necrosis choose hip preservation therapy, that is, medullary core decompression or fibula flap transplantation, the recovery time after surgery is about one month, the fibula flap and the cancellous bone in the femoral neck fuse with each other for about four weeks, so in 2, total hip replacement surgery: the recovery time is also about four weeks, total hip replacement surgery can completely remove all the necrotic femoral head and diseased tissues, the next day after surgery, you can walk on the ground with weight, but because after surgery to carry out routine joint function training and gait training, it usually takes a month to completely walk freely.