The invention relates to an acetylene generator which comprises a housing, a frame, a driving motor, a speed reducer flange, an upper shaft, a lower shaft, a material division cap, a first material distribution plate, a second material distribution plate, a third material distribution plate, a fourth material distribution plate, a fifth material distribution plate and a sixth material distribution plate, wherein the material division cap, the first material distribution plate, the second material distribution plate and the third material distribution plate are connected to the upper shaft from the top to the bottom; and the fourth material distribution plate, the fifth material distribution plate and the sixth material distribution plate are connected to the lower shaft from the top to the bottom. The dry-process acetylene generator provided by the invention is improved based on a present dry-process acetylene generator. As a shaft scraper is arranged below the second material distribution plate and the fourth material distribution plate of the generator, problems of excessive pressure of the generator and high stirring load which are caused by carbide slag bonded at a central feed opening are solved. After the shaft scraper is arranged, service cycle of the generator is prolonged, loss of nitrogen and acetylene gas during displacement before and after overhaul, and capacity utilization is greatly raised so as to further realize purposes of safe and stable production, energy conservation and consumption reduction. The dry-process acetylene generator provided by the invention has a simple and reasonable structure, is convenient to operate and maintain, requires low cost, and can be applied in the dry-process acetylene generation process.