The top rotary screen machine has the triple function of polishing, dusting and lifting. The entrance of the machine can be connected with any type of tablet press, and the exit can be connected with the metal detector. The on-line production mode of tablet polishing, dust removal, lifting and metal foreign matter detection is realized. The machine has the characteristics of long dust removal path of tablets, automatic surface polishing of tablets and good dust removal effect. The material of the machine and drug contact parts is SUS 316L. In line with the requirements of GMP, the screen body and cover of the machine are designed with building blocks, the exit height is easy to adjust, the whole machine adopts the quick-load connection structure, making the disassembly and installation of the machine faster, cleaning without dead corners, and the machine entrance and exit can be adjusted 360 degrees. This makes it easy to produce and saves space. The outstanding production efficiency can meet the mass production of various shapes of Φ3-Φ25mm tablets. The design of the driving device used ensures that the machine runs more smoothly and has low noise.