The invention relates to the field of eraser pad printing devices, in particular to an eraser automatic pad printing machine. The eraser automatic pad printing machine comprises a vibratory feeding disc, an adjusting device, an alignment device, a positioning device, a pad printing device and a discharging device, and material channels are formed in the vibratory feeding disc; the pad printing device includes a mounting frame, a drive assembly, a pad printing assembly and an oil feeding assembly; the oil feeding assembly includes an oil feeding plate, a printing ink bottle and a clamping part,a printing ink groove is formed in the oil feeding plate, a sliding block is arranged at the lower end of the oil feeding plate, and a first sliding trough is arranged on the mounting frame; the clamping part includes a clamping cover and two connecting rods, the upper ends of the two connecting rods are provided with a cross rod, and the upper parts of the two connecting rods are provided with spacing rings; two through slots are formed in the mounting frame, and first springs are arranged at the lower parts of the through slots; and a clamping slot is formed in the lower end of the clampingcover, and a baffle is arranged beside the printing ink bottle. According to the eraser automatic pad printing machine, the automatic pad printing of erasers is realized, and the yield rate reaches 99.9% or more; and according to the pad printing process, the labor is saved, the production efficiency is improved, and the erasers of multiple types can be processed.