The invention relates to a two-dimensional micro-scanning device for a digital oral cavity intelligent assistant diagnosis and treatment system, which belongs to the field of electromechanics and consists of the micro-scanning device, an oral cavity endoscope system and a main controller, wherein the main controller (3) is used for controlling the micro-scanning device to drive the oral cavity endoscope system to realize translation in the directions of an X axis and a Y axis, and a mechanical part of the micro-scanning device consists of a stepping motor, a coupler, a transmission gear box, a linear bearing, a flexible coupler, a ball screw and nut pair, a limit switch, a zero-position photoelectric switch and a workbench; and a control part of the micro-scanning device is constituted by a driver of the stepping motor and controlled by the main controller. The micro-scanning device for the digitaloral cavity intelligent assistant diagnosis and treatment system is characterized by effectively forming multi-view visual imaging while realizing automatic scanning of an oral cavity image and a tooth image of a patient, and providing data for three-dimensional reconstruction and obtainment of an optimal treatment scheme for oral cavity and teeth of the patient; furthermore, the system has stronger stability robustness.