The invention discloses a roller table device for conveying ingot blanks of small and medium-size hot rolling mills, which comprises a feeding roller table assembly, an arc-shaped guiding roller table, a discharging roller table assembly and a discharging guiding mechanism. The arc-shaped guiding roller table is arranged between the feeding roller table assembly and the discharging roller table assembly, the feeding roller table assembly, the arc-shaped guiding roller table and the discharging roller table assembly are sequentially connected, and the discharging guiding mechanism is arranged on the discharging roller table assembly. Ingot blanks can be perpendicularly turned and conveyed to a plane of a hot rolling mill from a heating furnace in a smaller space due to the arc-shaped guiding roller table, requirements of ingot blank production of the small and medium-size hot rolling mills are met, one the one hand, shortcomings of an existing conveying mode are overcome, and on the other hand, conveying efficiency is improved, manual assisting time is saved, temperature drop in a hot rolling process is controlled better, smooth hot rolling is guaranteed, and hot rolling operation is more convenient.