The utility model discloses a traffic marking measuring apparatu, it includes: the base, it includes two lateral walls and a roof, first guide slot, it sets up and distributes on the roof and along left right direction, the thickness measurement slide, its lower extreme is in order can gliding mode setting up in first guide slot, thickness reading panel, it erects on the thickness measurement slide and its second guide slot that is provided with a longitudinal distribution, the thickness measurement pointer, its one end hinges on thickness reading panel with mode that can the luffing motion, the scale is markd to thickness, and it sets up on thickness reading panel and corresponds with the other end of thickness measurement pointer, and the guide arm, its upper portion set up in the secondguide slot with gliding mode from top to bottom and its upper end with the thickness measurement pointer corresponds, the lower extreme downwardly extending of guide arm is to the below of roof. Theutility model discloses a low in cost, easy operation, its size that can make things convenient for and accurately measure the marking.