The work aims to design a mixing and conveying machine to achieve the uniform mixing, measurement and conveying of two kinds of viscous materials in tubes. The motion direction of nuts was controlled based on the coordination of screws and nuts in the rolling screw and linear guide, so as to carry out motion transmission and achieve the rectilinear motion of push plate. By doing so, the viscous materials in tubes were pushed. The materials were stirred by the stirring paddle in the extrusion head driven by the rotation of the stirring rod. After accurately measured, the mixed materials were pushed and injected into the terminal container. With AT89S52 MCU as the core of control system, the pushing motor and stirring motor were subject to DC PWM speed regulation. Two kinds of viscous materials in tubes were pushed and mixed, which achieved the function of uniform mixing, conveying and infusion. For different material properties, the mixing and filling speeds were easy to be controlled and flexibly adjusted. The small viscous material mixing mechanism has the advantages of compact structure, stable operation, convenient adjustment and strong adaptability, which enriches the mixing and filling machine product.