The invention discloses a method for comprehensive utilization of production tailings in gem processing. Through a plurality of times of sieving and screening, marginal tailings are re-classified andre-used, multi-grain grade quartz raw material products with higher SiO2 content can be produced in large quantities, and the products of various grain grades has a high output rate and can be directly used as raw materials of artificial quartz stone products after drying, and can further be screened into various grain grade products meeting customer requirements according to different particle size requirements of customers; and the fine-grain grade tailings can be subjected to impurity removal and purification through a combined process of grinding, grading, magnetic separation and re-selection to produce a large amount of process ceramic raw material products with the higher SiO2 content and further produce a small amount of Fe2O3 and other products to be used as ceramsite raw materials. The method fully refines the tailings in gem processing, and rationally utilizes resources, thereby saving the resources, reducing mineral waste, avoiding adverse effects on the environment and being environmentally friendly.