The femoral intramedullary nail system is divided into reconstruction nail mode, femoral nail mode, and gamma nail mode. and tail cap. The angle between the reconstruction mode locking nail and the femoral mode locking nail and the main nail is 130 degrees, the femoral interlocking intramedullary nail has a declination angle of 5 degrees, which is convenient for insertion from the group grand crown, and the reconstruction mode locking nail has a 12 degree angle. The forward inclination angle can be fixed in different combinations according to the usage scenarios, so as to facilitate the use of doctors. It can permanently fix common mid-femoral fractures, and it can also be used to fix multi-segment fractures of the proximal and mid-femur. It has a wide range of usage scenarios, so it has been well received by doctors.