The invention discloses an air return louver. The air return louver comprises a bottom frame used for being fixed to a building, and an air return louver panel connected to the bottom frame in a matched mode. A filter device is arranged between the bottom frame and the air return louver panel. The bottom of the air return louver panel is hinged to the bottom frame. The filter device comprises a non-planar filter screen with wrinkles, and a filter screen supporting frame. The air return louver is compact in structure and firm in combination, and the non-planar filter screen with wrinkles can increase the filter area and improve the filter effect. The filter screen is connected with the bottom frame through clamping jaws on the supporting frame, so that disassembly is convenient, and the filter screen is convenient to replace, disinfect and clean.