Bud grafting device

The invention discloses a bud grafting device which comprises a vertically-arranged supporting plate, the upper end and the lower end of the supporting plate are each provided with a first cutter, the left end and the right end of the supporting plate are each provided with a second cutter, and the two first cutters and the two second cutters form a square cutting edge; pressing grooves penetrating front and back are formed in the upper end and the lower end of the supporting plate correspondingly, the pressing grooves are in an inclined state with the front portions higher than the rear portions, sliding grooves are evenly formed in the sides, away from each other, of the two pressing grooves from left to right, and the first cutter comprises a first blade, a sliding rod, a limiting block, a pressing block, a rotating shaft, a first bevel gear, a second bevel gear and a power mechanism. The positions of the first cutter and the second cutter are fixed, notches and grafting buds corresponding in size can be c