Laser positioning device of dental film machine

The utility model provides a dental film machine laser positioning device, which is used for assisting the shooting positioning of an X-ray bulb tube in a dental film machine, and an operator can fix one or more laser emitting parts on the X-ray bulb tube by designing a scale strip which is fixed on the X-ray bulb tube in a surrounding manner and a plurality of laser emitting parts which are detachably connected to the scale strip in a sliding manner. Laser emitted by the laser source is irradiated on a picture irradiated by the X-ray bulb tube so as to assist an operator in positioning root tip film shooting; wherein the laser emitting part is provided with a laser source and a connecting part which are rotationally connected with each other, and the laser emitting part can be rotated to adjust the laser irradiation height so as to adjust the shooting angle, so that when laser positioning is used for assisting X-ray bulb tube shooting clinically, the apical film shooting positioning is more accurate; and mea