The UAV structural elements' quick-release fastening system, which includes at least two tail booms coupling with a center wing section/fuselage of a UAV and a tail assembly by at least two quick-release coupling elements from the center wing's section side and at least two coupling elements from tail assembly's side, the UAV wiring elements. The docking chucks are used as the quick-release coupling elements. Coupling and fixing the tail booms with a tail assembly realized by the tail assembly docking chucks and a bayonet mount. Coupling and fixing the tail booms with a center wing section/fuselage of a UAV is realized by the center wing section docking chucks and the center wing section fixing pins or by the center wing section docking chucks and bayonet mount. The system is generally used in a UAV design with integral or dismountable tail assembly.