The invention discloses a bottle reject mechanism of an online visual inspection robot for visible foreign matters in bottled liquid, which is characterized in that the bottle reject mechanism comprises a rotatable cam, a swing link seat, a C-shaped long swing link, a C-shaped short swing link and a clutch mechanism, wherein the C-shaped long swing link and the C-shaped short swing link are both arranged on the swing link seat; the C-shaped long swing link is embedded in a groove of the rotatable cam through a deep groove ball bearing so as to lead the rotatable cam to drive the C-shaped longswing link to do periodic swinging along with the rotation of the rotatable cam; the free end of the C-shaped short swing link is provided with a push plate for rejecting a bottle body; and the clutch mechanism comprises a cylindrical pin arranged on the C-shaped long swing link, a frame-type electromagnet arranged on the C-shaped short swing link, a limit supporting block, a claw and a clutch plate. The bottle reject mechanism of the online visual inspection robot for the visible foreign matters in the bottled liquid can effectively realize the separation of accepted and unaccepted products by the visual inspection robot and dramatically reduces the possibility of extruded and blown bottles at the bottle outlet.