Accurate interpupillary distance adjusting mechanism of operating microscope

The invention discloses an accurate interpupillary distance adjusting mechanism of an operating microscope. The accurate interpupillary distance adjusting mechanism of an operating microscope includesa microscope lower base, a microscope upper base, a right angle prism base, a ball head rod, an adjustment rod, disc springs, thread inserts, scale knobs, plain washers, elastic washers, screws, plastic covers and an eyepiece tube. The interpupillary distance values indicated by the scale knobs are equal to the practical interpupillary distance value. When an operator of the accurate interpupillary distance adjusting mechanism of an operating microscope is changed, if the interpupillary distance which is most suitable for the operator at last time is remembered, the interpupillary distance can be quickly adjusted to a value suitable for the operator when the accurate interpupillary distance adjusting mechanism of an operating microscope is used again. The scale knobs at two sides of the accurate interpupillary di