The invention provides a germ-remaining rice detection executing mechanism, which comprises a chassis, and a power switch, an alarm indicating lamp and a display screen which are arranged on the chassis, wherein a partition plate is installed in the box body, an industrial control computer is installed on the partition plate, a pedestal is arranged between the partition plate and the bottom part of the box body, a camera and a light supplementing lamp are arranged on the pedestal, a strip-shaped slit is formed in the back surface of the box body, a stepping motor 1 and a stepping motor 2 are arranged in the box body, an output end of the stepping motor 2 is connected with a fan-shaped tray, an output end of the stepping motor 1 is connected with a rolling brush, the rolling brush is positioned above the fan-shaped tray, a contact switch 1 and a contact switch 2 for limiting motion of the fan-shaped tray are arranged on the inner bottom of the box body, and the width of the strip-shapedslit is greater than the thickness of the fan-shaped tray. The germ-remaining rice detection executing mechanism can realize fully automatic germ-remaining rice detection, and the germ-remaining ricein the acquired image cannot stack, thereby making image processing easy.