The invention relates to a sealing booster-type slurry pool device for an overhead light source 3D printer. The sealing booster-type slurry pool device comprises a main slurry pool, a light source mechanism, a transparent sealing mechanism, a lifting mechanism, a sample platform and a booster filling mechanism, wherein the main slurry pool is filled with liquid slurry for light solidification, thelight source mechanism is installed above the device, the transparent sealing mechanism is installed on the top of the main slurry pool, the lifting mechanism is installed in the main slurry pool, the sample platform is installed on the lifting mechanism, and the booster filling mechanism is connected with the main slurry pool. According to the sealing booster-type slurry pool device, the heightcontrol over slurry in the slurry pool can be guaranteed, the coating step of the surface layer of the slurry after light solidification is omitted, the printing time is shortened, the defects of level fluctuation and uniformity in coating of a traditional scraper type spreading structure are overcome, the influence of the slurry flowability on a slurry filling process is reduced, the working efficiency is improved, and the printed layer thickness accuracy is increased.