Automatic measuring device and measuring method for drill rod joint

The invention relates to the technical field of automatic measuring devices, in particular to an automatic measuring device and method for a drill rod joint, and aims to solve the problems that the measurement of the drill rod joint is tedious, errors are easy to occur and abrasion is caused. The invention provides an automatic measuring device for a drill rod joint. The automatic measuring device comprises a detection bracket and a laser distance measuring sensor, the two laser distance measuring sensors are installed on the detection support and located on the two sides of the drill rod connector respectively. The connecting line of the two laser distance measuring sensors passes through the drill rod joint and is perpendicular to the axis of the drill rod joint for measuring the diameter of the drill rod joint; the detection support can drive the laser ranging sensor to move in the axis direction of the drill rod connector. The laser distance measuring sensor moves in the axis direction of the drill rod co