The invention discloses an automatic light inspection machine foreign matter detection device, which includes more than one detection stations. Each detection station is equipped with a camera to provide a bright field light source assembly for bright field lighting and provide a dark field light source assembly for dark field lighting. The bright field light source assembly and the dark field light source assembly illuminate one to-be-detected bottle alternately, and the camera performs image acquisition on the to-be-detected bottle when the to-be-detected bottle is illuminated. The device provided by the invention has the characteristics of simple structure, low cost, high detection efficiency and accuracy, and can simultaneously realize bright field and dark field detection at one station.