A variety of powder materials are added to the mixing powder turnover bucket in proportion, and the circulating bucket is sent into the mixing position after being fixed by the mobile lifting trolley. The mixer automatically turns the materials in the turnover barrel through PLC to stir and mix. The materials are quickly and repeatedly thrown by the stirring paddle to make the powder fully stirred and mixed evenly. The powder can be stirred and mixed many times after being turned over many times. Efficient mixing method to achieve high uniformity of mixing.