The invention relates to a sawtoothed angle regulation mechanism for a two-dimensional spray pipe. The sawtoothed angle regulation mechanism comprises a mounting base, an actuator cylinder, a pull rod, a right sealing plate, a right baffle plate, a mounting base, a pull rod, a mounting seat, a left baffle plate and a left sealing plate, and is specifically characterized in that the mounting base is fixedly arranged on a two-dimensional spray pipe constriction regulation plate; a side sealing baffle plate is fixedly arranged on the left and right mounting edges of a round-to-square cylinder; one end of the actuator cylinder is connected with the mounting base, the other end of the actuator cylinder is connected with the hinged position of the pull rods through a rotating pair; the right baffle plate and the left baffle plate are connected at a tip end position through a rotating pair, and the rotating pair is kept being perpendicular to the constriction regulation plate; the outer end surfaces of the right sealing plate, the right baffle plate, the left baffle plate and the left sealing plate are guaranteed to be in the same one plane; the right sealing plate and the left sealing plate slide in the right baffle plate and the left baffle plate through sliding pairs, so that the effective regulation on the sawtoothed angle of the two-dimensional spray pipe can be realized. The sawtoothed angle regulation mechanism has the advantages of being simple in structure, fewer in movement connecting parts, good in stealth performance, and capable of realizing the regulation on the sawtoothed angle of a two-dimensional spray pipe outlet.