SD hanging bag centrifuges are all closed, intermittently operated, and remote bag unloading filtration equipment. The material is added to the drum from the top. Under the action of the centrifugal field, the liquid phase passes through the filter medium and is discharged from the machine, and the solid phase is retained in the drum. After the machine is stopped, the liquid blocking plate and the filter bag are lifted out together with the lifting device and unloaded at the designated location. It has the characteristics of smooth start-up, adjustable separation factor, large capacity, high efficiency, simple operation, quick unloading, good safety performance, clean environment, and low labor intensity.