Relating to the technical field of calcium carbide pots, the invention provides a calcium carbide pot bottom and a making method thereof. The calcium carbide pot bottom comprises the following raw materials by weight: 2-4 parts of electrically calcined coal, 6-8 parts of graphite, and 0.5-2 parts of silicon carbide. Compared with existing normal steel casting calcium carbide pot bottoms, the calcium carbide pot bottom provided by the invention has the advantages of high resistance temperature, high compression capability, light weight, low price, difficult breakdown and deformation, and has greatly reduced production cost and prolonged service life. At the same time, after use of the calcium carbide pot bottom provided by the invention, operators do not need to lay semi-coke foam or lime foam at the pot bottom and do not need to squat at the pot bottom. Therefore, generation of dust by impact of high temperature calcium carbide to the semi-coke foam or lime foam at the pot bottom can be completely eradicated, the work efficiency is improved, and the labor intensity and pollution to the environment are lowered.