Quickly detachable tail fin device

The utility model discloses a device capable of quickly detaching a tail fin, which comprises a base and the tail fin detachably matched with the base, an inserting plate extending in the same direction as the fin width is formed at the fin width position of the tail fin, a limiting protrusion protruding outwards is formed on the side wall close to one end of the inserting plate, and a detaching clamping part is arranged at the other end of the inserting plate. A clamping mechanism is movably installed in the dismounting clamping part, the base comprises a limiting piece, the limiting piece is provided with a segmented inserting groove matched with the inserting plate, an interval segment is formed in the middle of the segmented inserting groove, and a sliding way matched with the limiting protrusion is formed in the inner side wall of the segmented inserting groove; the base and the tail fin are connected and fixed in a sliding and buckling mode, the disassembly and assembly work of the base and the tail fin