The utility model relates to an acetylene generator. The acetylene generator comprises a shell, a rack, a driving motor, a speed reducer flange, an upper shaft, a lower shaft, a material separation cap, a first material distribution tray, a second material distribution tray, a third material distribution tray, a fourth material distribution tray, a fifth material distribution tray and a sixth material distribution tray, wherein the material separation cap, the first material distribution tray, the second material distribution tray and the third material distribution tray are connected to the upper shaft from top to bottom; the fourth material distribution tray, the fifth material distribution tray and the sixth material distribution tray are sequentially connected to the lower shaft from top to bottom. The acetylene generator is improved on the basis of an existing dry-method acetylene generator; by arranging shaft scrapers below the second material distribution tray and the fourth material distribution tray of the generator, the problems of over-high generator pressure, high stirring load and the like caused by adhesion of acetylene slag to a central discharging hole of the generator are solved. By arranging the shaft scrapers, the service cycle of the generator is prolonged, the loss of nitrogen gas and acetylene gas during replacement before and after maintenance is reduced, the usage rate of equipment is greatly increased, and the aims of safe and stable production, energy conservation and consumption reduction are further achieved. The acetylene generator has the advantages of simple and reasonable structure, convenience in operation and maintenance, low cost and the like, and can be applied to a dry-method acetylene generation process.