The invention relates to the technical field of production and processing of seamless steel pipes, and in particular relates to a process for a thin-wall hot-rolled seamless steel tube in double mandrel two-roll rotary rolling production, the thin-wall hot-rolled seamless steel tube is capable of performing two-roll rotary rolling at a high remaining temperature after perforation, the seamless steel tube has the advantages of high production efficiency, high quality and low production cost, a perforated hollow billet is secondarily heated, then a mandril passes through the hollow billet in advance, while the mandril passes through the hollow billet in advance, a lubricant is sprayed, the mandril sprayed with the lubricant passes through the hollow billet, then enters a two-roll rotary rolling set for rolling, a rolled pierced billet enters a three-time heating furnace for three times of heating, after the three times of heating, a hot finished tube is formed by reducing, sizing and shaping, and a finished tube formed by cooling of the hot finished tube is straightened, copped, inspected, packed, labeled, and stored to form a commercial tube, roll burst of the horizontal tissue of the seamless steel tube rolled by the process is not easy to produce, black threads are not easy to produce, the outer diameter sizes of the front end and the back end are improved by 25%, and the accuracy is increased by 20%.