The bearing-less composite tail rotor is one of the most important components of helicopters, and their manufacturing quality directly affects their service life, but the traditional handmade manufacturing technology is far from meeting the current requirements. This paper studies the exiting automatic manufacturing technology of composite tail rotors, and in the forming process of the flexible beam of the tail rotor, the self heating and self pressurization molding system is used to determine the time of the pressure according to the viscosity of the resin, and the perfect manufacturing of the flexible beam of tail rotor blade is realized. The stability of the tail rotor blade manufacturing is ensuring by using automatic heating and boring process in assembling, and the qualification rate of the product is greatly improved. At the same time, combined with the current situation, the development direction of tail rotor blade manufacturing technology is briefly described.