Filter bent frame

The utility model discloses a filter bent frame which comprises a frame body, at least two ventilation flow channels which are through in the front-back direction are defined by the frame body, and every two adjacent ventilation flow channels are communicated with each other. The front partition assembly is connected to the front end face of the frame body, and the front partition assembly is arranged on the upper side and the lower side of the ventilation flow channel; the rear partition assembly is connected to the rear end face of the frame body, and the rear partition assembly is arranged on the upper side and the lower side of the ventilation flow channel; the first pressing piece penetrates into the front partition assembly; polluted gas sequentially passes through the gas inlet channel, the pre-filter, the ventilation flow channels and the HEPA filter of the wall body and is discharged, static pressure of all the ventilation flow channels is the same, pressure difference values of all the ventilation f