To solve the problem of different properties of propellant product in the process of propellant, the automatic mixing equipment and technology of propellant are studied. The composition and working principle of mixed equipment such as circular bucket type, rotary type, gravity type and the third linkage type are introduced respectively, the paper analyzes the actual application scope, advantages and disadvantages, and puts forward the improvement ideas for the shortcomings, the automatic mixing of propellants is discussed. This study can provide a theoretical reference for the production of propellant mixture, so as to better control the mixing process and improve the consistency of products.