The invention relates to a rotary stirring device, comprising a stirring tank, a rotary drive assembly, a linear drive assembly mounted on the rotary drive assembly in a coordinating mode, and a rotating disk, wherein the linear drive assembly drives the rotary drive assembly and the rotating disk to move downward, and the rotating disk stretches into the stirring tank and is rotated through the rotary drive assembly to complete the extrusion of slurry at the bottom of the stirring tank and the rotary shocking stirring of surrounding slurry. According the rotary stirring device, the linear drive assembly drives the rotary drive assembly and the rotating disk to move into the stirring tank to complete the extrusion of slurry at the bottom of the stirring tank and the rotary shocking stirring of surrounding slurry, and the technical problems that the slurry which is boned to blocks at the bottom is not easy to stir and is mixed unevenly are solved.