The invention discloses a clutch of an electric power unmanned aerial vehicle. The clutch comprises a triangular base, clutch swinging blocks and return springs. Through changing the structure and the material of the clutch swinging blocks of the original clutch of the electric power unmanned aerial vehicle and adopting a 40Cr material which is more wear-proof and has better shock resistance and higher hardness to replace the original powder metallurgy material, and by taking measures of increasing the thicknesses of the left side walls and the right side walls of the three clutch swinging blocks and reducing gaps between the left inner side walls and the right inner side walls of the clutch swinging blocks, great contact stress borne by the side walls of clutch swinging blocks because greater relative speeds are generated between the side walls of clutch swinging blocks and the triangular base in a starting moment is weakened effectively. In addition, the problems that a contact area is too small and the stress is concentrated due to the facts that fit clearances among the clutch swinging blocks and the triangular base are too large, and the fact that the engagement diameters of the clutch swinging blocks are not consistent with that of a clutch cover after the clutch swinging blocks are swung outwards are solved effectively. The problem that the original clutch swinging blocks break due to the fact that the original clutch swinging blocks can not bear great contact stress for a long time is solved effectively. The normal power transfer function of the clutch is ensured, and the flight safety of the electric power unmanned aerial vehicle is improved greatly.