The invention relates to a process for synthesizing a calcium carbide smelting raw material by extruding semi-coke, calcined coal and lime powder. The process comprises the following steps: uniformly mixing semi-coke powder, calcined coal powder, lime powder and mesothermal coal tar pitch according to a weight ratio of 28-30%:28-30%:28-30%:16-10%; stirring the mixture for 10 to 15 minutes at a constant temperature of 200 DEG C to 220 DEG C; extruding the mixture into balls with a mixture extrusion moulding machine; cooling the balls to obtain the calcium carbide smelting raw material. The invention enables semi-coke, calcined coal and lime to be fully utilized in calcium carbide smelting under the conditions of low cost and low technical requirements, thereby achieving the goals of reducing cost, saving resources and protecting environment.