The invention discloses a glass tube bubble foreign matter visual inspection device and relates to the technical field of visual inspection. The glass tube bubble foreign matter visual inspection device comprises a glass tube to be detected, a background plate, a camera, lasers, an industrial control computer and an alarm. The background plate is arranged at a first end of the glass tube. The multiple lasers are arranged at a second end of the glass tube. Laser light is perpendicular to the cross section of the glass tube, then is transmitted into the glass tube from the second end of the glass tube, then goes through the glass tube and then is projected to the background plate. The camera is used for taking a picture of a laser projected image on the background plate and is connected to the industrial control computer in a signal connection way. The alarm is used for alarming when bubble foreign matters are detected and is connected to the industrial control computer in a signal connection way. The glass tube bubble foreign matter visual inspection device has a simple structure, realizes fast and accurate detection of a glass tube containing bubble foreign matters, saves labor and prevents artificial detection instability.