The invention provides a cutting reaction device for yellow phosphorus. The cutting reaction device comprises a yellow phosphorus channel, a blocking hole, a circulating channel, a reaction tank, a discharging hole, a controller, an upper liquid level inductor, a liquid level inductor, a water inlet, a water inlet switch, an inductor, a yellow phosphorus inlet, an emergency valve, an automatic valve, a manual valve, an air blower, a fixed rod, a fan, a grid and a rotating cutting piece. By arranging the rotating cutting piece with the surface as an annular blade notch in the use process, aftera yellow phosphorus block slides to the surface of the rotating cutting piece from the yellow phosphorus inlet, the yellow phosphorus block is pushed to rotate close to the inner wall of the yellow phosphorus channel through wind and is cut and thinned by the rotating cutting piece on the inner wall of the yellow phosphorus channel, so that the contact area of yellow phosphorus is increased, andthe subsequent reaction is relatively adequate; and by arranging the blocking hole in which small-holes are formed in the surface, the small yellow phosphorus blocks do not enter a circulating channelafter falling into a diversion hole, so that the influence caused to the operation in the circulating channel is avoided.