Preparation mold and method for gel casting of reactive sintering silicon carbide barrel

The invention relates to a preparation mold and method for gel casting of a reactive sintering silicon carbide barrel, and relates to the technical field of silicon carbide products. The inner cylinder body comprises an inner cylinder body, an outer pipe and an outer barrel, the outer pipe is arranged outside the inner cylinder body in a sleeving mode, one end of the inner cylinder body extends out of the outer pipe and is connected with a first base plate, the outer pipe abuts against the surface of the first base plate, a first forming cavity is formed between the inner wall of the outer pipe and the outer wall of the inner cylinder body, and the first forming cavity is used for pouring paraffin and forming an inner barrel mold; the inner diameter of the outer barrel is larger than the diameter of the inner barrel mold, a second base plate is arranged on the inner wall of one end of the outer barrel, the inner barrel mold abuts against the second base plate after being inserted into the outer barrel, a seco