The utility model relates to the field of grading culture ponds, in particular to a grading culture pond for rare and endangered fish fingerlings, which adopts the technical scheme that the grading culture pond comprises a fish mixing pond, a first-stage
fish pond is arranged below one side of the fish mixing pond, and a second-stage
fish pond is arranged below one side, far away from the fish mixing pond, of the first-stage
fish pond; a third-stage fishpond is arranged below the side, away from the first-stage fishpond, of the second-stage fishpond, screening sliding ways are installed on one sides of the first-stage fishpond, the second-stage fishpond and the third-stage fishpond, and a feeding device is arranged above the screening sliding ways; the
sturgeon screening device has the advantages that sturgeons in the mixed fish pond are screened into the first-stage fish pond, the second-stage fish pond and the third-stage fish pond according to the sizes through the screen in the screening sliding way, the sturgeons in the screening sliding way are guided to actively pass through the screen through the feeding device in the grading screening process, and the desire of Chinese sturgeons to actively pass through the screen is improved; and the grading speed of the screen is increased, and the grading efficiency is greatly improved.