The invention belongs to the field of interior
ballistics transmitting, and particularly relates to a mixed bullet belt device containing pre-set
carving grooves. The mixed bullet belt device containing pre-set
carving grooves comprises a plastic bullet belt ring I, a
metal bullet belt ring and a plastic bullet belt ring II, wherein the plastic bullet belt ring I and the plastic bullet belt ring II are arranged on two sides of the
metal bullet belt ring; the pre-set
carving grooves are formed in the plastic bullet belt ring I, the
metal bullet belt ring and the plastic bullet belt ring II; andthe shapes of the pre-set carving grooves are the same, and are matched with a
barrel and a
rifle. The mixed bullet belt device containing pre-set carving grooves disclosed by the invention adopts the mixed bullet belt; after being heated, the plastic bullet belts on the two sides rapidly expand, so that the gaps between the bullet belt, the
barrel and the
rifle are reduced, and the sealing performance of the
system is improved; and besides, the plastic bullet belts are firstly in contact and collision with the
barrel instead of metal materials of which the intensity is large in an integratedmetal bullet belt, so that the collision damage on the inner wall of the barrel caused by vibration of cannonballs is reduced, finally, the performance of a launch
system is improved, and the servicelife of the launch
system is prolonged.