Ventilation device for building design

The utility model belongs to the technical field of ventilation equipment, and discloses a ventilation device for building design, which is technically characterized by comprising a pipe body, uniformly distributed baffles are respectively arranged at two ends of the pipe body, a fixing block is fixedly mounted in the middle of an inner cavity of the pipe body through a support, and a motor is fixedly mounted on the side wall of the fixing block. An output shaft of the motor is fixedly connected with a rotating shaft, multiple sets of fan blades are arranged on the surface of the rotating shaft, a filter screen is fixedly installed on the inner wall of the pipe body, a dust removal mechanism matched with the filter screen is arranged in an inner cavity of the pipe body, the dust removal mechanism comprises a sweeping assembly and a driving assembly, and the sweeping assembly is connected with the filter screen. The driving assembly comprises a transmission part and a reset part, one end of the transmission pa