The invention belongs to the field of blanking of color sorters, and particularly relates to a blanking vibrating screen of a color sorter. The blanking vibrating screen of the color sorter comprises a vibrating screen body, wherein a rectangular material channel is arranged in the vibrating screen body, a separation line along a diagonal of the material channel is arranged in the material channel, a material sorting channel is arranged on one side of the separation line, a blanking channel on arranged on the other side, the blanking channel comprises at least two sub blanking channels, and a baffle is arranged between every two sub blanking channels. According to the vibrating screen, the diagonally arranged separation line of the sorting channel and the blanking channel is adopted, so that the chance that materials pass through each sub blanking channel in the blanking channel is equal, the blanking vibrating screen is even in sorting and blanking, the color sorting working efficiency of the color sorter can be effectively improved, and the color sorting capacity can be improved.