The invention discloses an ocular lens auxiliary observation apparatus for a microscope to physics teaching. The apparatus herein includes a hollow cylinder which has an upper end and a lower end opened, a display which is disposed in the upper end of the cylinder, an image sensor which is disposed inside the cylinder, a lens assembly which is arranged inside the cylinder and can achieve axial displacement. The display and the image sensor are connected through a data line. The image sensor and the lens assembly are successively away from the display. The lens assembly includes a plurality oflenses which face the image sensor and are at intervals from one another. The apparatus herein keeps the original structure and adjusting steps of an instrument, and helps the observation of phenomenon in experiment and use in teaching.