The invention relates to a double-shaft vertical stirring machine and belongs to the field of mixing and stirring. The double-shaft vertical stirring machine comprises a cylindrical shell and is characterized in that the shell comprises an upper part and a lower part, a retaining plate is arranged between the upper part and the lower part, and a spindle is arranged in the upper part in a penetrating manner; the bottom of the upper part is provided with a gear box, the spindle is directly mounted in the middle of the gear box, two sides inside the gear box are respectively provided with a leftdrive shaft and a right drive shaft, the left drive shaft and the right drive shaft penetrate the retaining plate, the left drive shaft is connected with a left stirring shaft, and the right drive shaft is connected with a right stirring shaft; the left stirring shaft and the right stirring shaft are provided with blades arranged in a staggered manner. The double-shaft vertical stirring machine iscapable of fast and uniformly stirring materials, reliable in work, high in stability and convenient for long-term use.