The invention discloses a quartz crucible forming mould. The quartz crucible forming mould comprises a metal alloy mould, an outer mould, a porous alloy base, a rotary table and a rotary shaft, wherein the outer mould sleeves the outer layer of the metal alloy mould, the porous alloy base is mounted in the bottom of the metal alloy mould, and is placed on the rotary table, and the rotary shaft is arranged below the rotary table. The quartz crucible forming mould has the advantages of being high in strength, long in service life, and capable of efficiently using heat energy and reducing power consumption; by adoption of the quartz crucible forming mould, the melting temperature is increased, so that metallic impurities in raw materials can be removed quickly, the defect that the raw materials have to rely on imports is overcome, the joint connection strength among particles is enhanced by high-temperature melting, the number of bubbles is reduced, the product quality is improved, the production period is shortened, the production efficiency is improved, energy sources are fully saved, and the production cost is reduced.