The invention discloses a dairy product processing and mixing device, which comprises a support device and a mixing and stirring device. A protruding object is arranged on the surface of a columnar bulge. An insulating layer is arranged on the inner wall of the inner cavity of a mixing box. A transfer pump is fixedly arranged at the lower end of the right side of the mixing box through a mountingbase. The upper end of the transfer pump is connected to a three-way valve through a bleeder tube. The three-way valve is arranged at the right side of the mixing box through a fixed plate, and the right end of the three-way valve is provided with a drain pipe. By fixedly arranging stirring vanes on a stirring shaft, the device of the invention has the function of mixing and stirring dairy products and accessories. By arranging triangular needles at two sides of the columnar bulge, the device has the function of breaking foams during the stirring process. By arranging electric heating plates at left and right sides of the inner cavity of the mixing box, the device has the function of promoting stirring and fermentation of dairy products. The device of the invention has characteristics of simple preparation technology, strong practicality and good mixing effect.