A bullet has a cartridge case to be discarded, which brings a lot of troubles. Now the invention processes the warhead part and the body part into a whole. Wherein, a primer cup is produced by solid sropellant wrapping gunpowder through cementation and is arranged at the step in the rear port of the body with pressure welding or cementation. When launching, the body is launched with the warhead, so there is nothing in the chamber so as to achieve that there is no cartridge case after launching. In the meantime, the invention causes the quality of the body to become part of the quality of the warhead, thus the bullet can launch maximum quality under the same caliber. That is, the invention can increase combat action of the warhead.