The invention discloses a variable-frequency liquid quick dispersing device which comprises a box. A rotating sleeve is arranged in the middle of the top of the box, a feeding pipe is arranged in therotating sleeve, a hopper is mounted at the upper end of the feeding pipe, and a driven gear is arranged on the feeding pipe between the hopper and the rotating sleeve and is in meshed connection witha driving gear mounted on a variable-frequency output shaft; multiple discharging holes communicated with the bottom of an inner cavity of the feeding pipe are formed in the side face of the lower end of the feeding pipe, a dispersing pipe is mounted on each discharging hole of the feeding pipe, multiple stirring rods are mounted on each dispersing pipe, a rotating shaft is mounted and fixed at the lower end of the feeding pipe, and spiral blades are mounted on the rotating shaft. The variable-frequency liquid quick dispersing device is novel in structure, reasonable in design and capable ofuniformly dispersing additives in liquid, thereby avoiding secondary processing, and is conducive to popularization.