The invention discloses a wood cutting device for paper making. The device comprises a window cover, an operation panel, a cutting main unit and two support feet, the window cover is installed at theupper end of the cutting main unit, the operation panel is embedded in the outer surface of the cutting main unit and electrically connected with the cutting main unit through a wire, the upper surfaces of the two support feet are welded to the lower surface of the cutting main unit, the cutting main unit comprises a shell, a cutting mechanism, a lifting mechanism, a transmission mechanism, a fixing mechanism, a falling rotating mechanism, a dust collecting mechanism and a rotating stirring mechanism, a chip suction opening is formed in the lower end of the cutting mechanism, saw dust generated in the cutting process is sucked from the chip suction opening into a hose and then reaches the interior of a chip collecting box through a draught fan, the saw dust is subjected to centralized processing, the phenomenon that the saw dust flies disorderly is prevented, by adding water into the chip collecting box, the water and the saw dust are mixed together, and a motor is started to make a second worm gear lever to rotate to drive a third worm gear lever to rotate, so that a paddle rotates to stir the mixture of the saw dust and the water, and then the saw dust is well utilized.