TMR diet is a fully mixed diet that fully mixes roughage, concentrate, minerals, vitamins and other additives, which can meet the nutrition of mutton sheep fed in houses. TMR feeding technology has been widely used in large and medium-sized sheep farms at home and abroad. Using this technology can avoid picky eaters and unbalanced nutrition; Improve weight gain and feed conversion rate; Reduce the feeding cost and feed waste; Reduce the number of workers and labor intensity; It can realize group management, improve labor productivity and reduce management costs. The commonly used TMR feed mixers are horizontal feed mixers and vertical feed mixers, and there are various specifications such as traction type and fixed type. The following matters should be paid attention to when using TMR feed mixer: ① According to the instructions of the mixer, master the appropriate mixing amount to avoid excessive load and affect the mixing effect. Usually the loading is 70%~80% of the total volume. ② Strictly follow the diet formula, ensure the accurate administration of each component, and regularly calibrate the metering controller. ③ According to the water content of silage and various feeds, master and control the water content of TMR diet. (4) In the process of adding, prevent impurities such as iron, stones and packing ropes from mixing into the mixer, causing vehicle damage.