Filtering device

The utility model relates to the technical field of environmental protection engineering, in particular to a filtering device which comprises a fixing frame, four fixing mechanisms are arranged on the face, close to a partition plate, of the fixing frame, and each fixing mechanism comprises a fixing plate, a fixing groove, a connecting plate, a containing frame and a filtering net. The fixing frame is divided into four parts through the filter screens, the matched partition plates and the two partition plates, if the four filter screens form a filter mechanism, and if one filter screen is damaged, the placing frame is pulled upwards to release the clamping connection between the connecting plate and the fixing groove, and at the moment, the connection between the placing frame and the partition plates and the fixing frame is released; when the damaged filter screen is disassembled and a new filter screen is installed, the connecting plate on the new placing frame is aligned with the fixing groove, the placing