Stirring device for livestock manure full-mixing type fermentation tank

The invention relates to a stirring device of a livestock manure full-mixing type fermentation tank. The stirring device comprises a fermentation tank, a stirrer and a hydraulic motor component, wherein the fermentation tank is used for accommodating a livestock manure mixed medium; the stirrer is positioned in the fermentation tank; and the hydraulic motor component serving as a power source directly drives the stirrer to rotate. The stirring device has a compact structure, is convenient to install and operate, safe, reliable and high in corrosion resistance, and hardly triggers safety accidents such as a fire hazard, explosion, methane leakage and the like.