The invention relates to a digit tooth-plate X-ray machine, which is formed by a micro-focus X-ray generator, an optical fiber aligner, a visible light converting screen, an optical fiber taper, a CMOS micro camera, a computer and a display. The invention can transmit the image of ill tooth via the USB interface of micro CMOS camera to the computer to be displayed on the display, printed, or transmitted remotely, to reduce cost, with simple structure, small volume, low radiation leakage, adjustable pulse voltage, wireless digit insulation control, and short operation time.