Optical bench vertical scale adjusting device

The utility model relates to an optical bench vertical scale adjusting device, comprising an optical bench and a support leg of the optical bench. The optical bench is provided with an upper guide rail and a lower guide rail which are parallel to the optical bench. The lower guide rail is fixedly arranged on the optical bench, the upper guide rail can glidingly run on the lower guide rail, and is provided with a telescopic antenna vertical to the guide rail. The top end of the telescopic antenna is provided with a vertically hung scale which can make the upper, lower, right and left movement on a vertical plane perpendicular to the optical bench along with the telescopic antenna, and can make the movement along the horizontal direction of the optical bench along with the guide rail, and moreover, the scale keeps the vertical state. Thereby, the front-back, and right-left optional adjusting on the vertical scale can be conveniently realized when the optical experiment of needing of determining the position of the virtual image and determining the size of the virtual image is made on the optical bench.