The invention discloses an air inlet louver and railway mobile power generating equipment. The air inlet louver comprises a louver frame defined by an upper frame, a left frame, a right frame, a lowerframe and a rear vertical plate, and a louver strip assembly. The upper frame comprises an upper perforated plate and an upper fixing plate. The left frame comprises a left frame body and a left perforated plate mounted on the left frame body. The right frame comprises a right frame body and a right perforated plate mounted on the right frame body. The lower frame comprises a lower fixing plate and a bottom inclined connecting plate connected with the lower fixing plate. A flow guiding cavity is formed among the rear vertical plate, the lower frame and the louver strip assembly. The louver frame of the air inlet louver is of a square structure, and thus the defect that a rear opening of a traditional louver is large and consequently occupies the space in a box is overcome; by arranging the perforated plates, the total area of an air inlet of the air inlet louver is increased, and the defect that the louver frame is in a cuboid shape and consequently the air inlet area is reduced is overcome; and rainwater can be filtered, and foreign objects are prevented from entering the louver.