The invention provides a bionic flapping wing with a wing tip slotted. The bionic flapping wing comprises a main beam (7), an inclined beam (8), wing ribs, a film skin (9) and a feather skin (6). A structure main frame of the flapping wing is composed of the main beam (7), the inclined beam (8) and the wing ribs. A frame unit close to a wing root is covered with the film skin (9). A frame unit close to the wing tip is a triangular frame defined by a main beam tip portion section, an inclined beam tip portion section and an nth wing rib root portion section. The outer side, facing the wing tip, of the nth wing rib is covered with multiple bird feathers as the feather skin (6). The front edge of the feather skin (6) is in a sweepback shape, and the rear edge of the feather skin (6) is in a slotted shape. The outer edge of the feather skin (6) and the film skin (9) are in arc transition. The bionic flapping wing with the wing tip slotted has the following beneficial effects that the strength and the direction of a wing tip vortex can be controlled, and the pneumatic efficiency of the flapping wing is improved, so that the flight capacity is improved, the weight is small, and reliability is high.