Fan blade nut length measuring device

The utility model relates to the technical field of measuring tools, in particular to a fan blade nut length measuring device, which enables measured data to be fed back to a user in a digital form and improves use convenience. The device comprises a sliding rail fixing plate, a first lower fixing block, a guide sliding plate, a guide block, a guide sliding strip, a sliding block, a measuring headmounting plate, a movable measuring head mounting rod, a movable measuring head, a fixed measuring head mounting block, a fixed measuring head mounting rod, a fixed measuring head, a microcomputer, adistance measuring rod, a sliding sleeve, a collision ball and a collision ball mounting block, the right end of the microcomputer is connected with the left upper side of the rear bracket; the distance measuring rod is slidably arranged in the circle center of the microcomputer, the sliding sleeve is arranged on the upper side of the middle of the rear support, the right end of the distance measuring rod is slidably arra