The invention discloses an improved type filter device which comprises a fixed frame, a driving component and a filter component installed on the fixed frame. The filter component comprises a spiral stirring part and a filter cartridge. One end of the spiral stirring part is provided with a first gear portion, one end of the filter cartridge is provided with a second gear portion, and the first gear portion and the second gear portion are coaxially arranged and are both driven by the driving component. The two ends of the filter cartridge are open. The spiral stirring part is inserted into the filter cartridge. The filter cartridge is provided with multiple filter holes and sleeved with a filter film and a sleeving shell. The bottom of the sleeving shell is connected with a water outlet pipe. The filter component further comprises a liquid inlet pipe and a bearing pipe, wherein the liquid inlet pipe is inserted to the open end, close to the second gear portion, of the filter cartridge, and the bearing pipe is used for bearing solid particles at the open end, away from the second gear portion, of the filter cartridge. The problems of film face concentration polarization and film pollution can be solved, and the film permeation flux and filter effect are significantly improved.