Online plate width measuring device

The utility model discloses an online plate width measuring device which comprises a bracket, a reference feeding guide strip is arranged on one side of the bracket, and an adjusting feeding guide strip matched with the reference feeding guide strip is arranged on the bracket through an adjusting mechanism. The adjusting mechanism comprises an adjusting lead screw and a limiting polished rod which are arranged on the bracket and are arranged in parallel, a moving block rotating along the adjusting lead screw is arranged on the adjusting lead screw, a limiting sleeve moving along the limiting polished rod is arranged on the limiting polished rod, the moving block and the limiting sleeve are fixed, and the adjusting lead screw and the limiting polished rod are arranged in parallel. An adjusting side photoelectric switch is arranged on the adjusting feeding guide strip; a reference side photoelectric switch is arranged on the reference feeding guide strip; a servo motor for driving the adjusting screw rod to rot