Butt joint structure of projectile body with special-shaped section

The invention provides a butt joint structure of a projectile body with a special-shaped section. The butt joint structure of the projectile body with the special-shaped section comprises a pluralityof sections of snap rings. Through the snap rings arranged at upper and lower key regular parts and left and right key regular parts, hinge and surface contact fitting of large-curvature or special-shaped corner parts, abutting surface material matching design and a snap ring circumferential limiting projectile body butt joint structure, the problems of difficult installation in place and disassembly, extremely high machining precision requirements on the snap rings and the corresponding parts of the projectile body and the like in the prior art are solved; and the high-precision reliable buttjoint of the butt joint structure of the projectile body with the special-shaped section is achieved, the connection rigidity is high, the installation and the disassembly are convenient, the requirement on the machining prec