The invention discloses an absorbent article manufacturing device, which comprises a material supply unit, a dividing unit, a conveying unit and a speed change gear, wherein the material supply unit is used for storing granular absorbent materials and delivering out the granular absorbent materials by a specified amount; the dividing unit is used for intermittently configuring the granular absorbent materials, which are outputted from the material supply unit, on the surface of a sheet-shaped material; the conveying unit is used for conveying the sheet-shaped material to the lower end face of an output side of the dividing unit at a certain speed; the speed change gear is used for increasing and decreasing the speed of conveying the sheet-shaped material and for keeping a conveying speed that the sheet-shaped material is guided into the speed change gear to be equal to a conveying speed that the sheet-shaped material is guided out of the speed change gear; and an operation of intermittently configuring the granular absorbent materials, which are outputted from the dividing unit, on the surface of the sheet-shaped material occurs within a time interval that linear velocity of the sheet-shaped material is reduced by the speed change gear. According to the absorbent article manufacturing device provided by the invention, on the basis of cooperation of a reciprocating translation driving mechanism and a speed-change rotation driving mechanism in the speed change gear, some section of speed of the material which advances at a constant speed is regulated in accordance with a preset speed-change rule, so that a granular absorbent material applying device, under the precondition of avoiding extensive damage of powder granules, can meet a high-speed production line demand.