Tower top distributor of methanol pre-synthesis tower

The utility model discloses a methanol pre-synthesis tower top distributor which comprises a main body assembly, a driving assembly and a distribution assembly, and the driving assembly comprises a motor, a transmission shaft, a telescopic rod, a connecting rod and a mounting seat; an output shaft of the motor is fixedly connected with one end of a transmission shaft, the outer side wall of the transmission shaft is fixedly connected with a telescopic rod, one end of the telescopic rod is rotationally connected with a connecting rod, and one end of the connecting rod is hinged to a mounting seat; the distribution assembly comprises a second distribution plate, a second distribution hole, a third distribution plate and a third distribution hole. According to the utility model, the second distribution holes are arranged to be the holes of which the diameters are sequentially increased from top to bottom, so that the flow speed of synthesis gas is gradually reduced, the phenomenon of disordered layers of a catal