Pavement pit area measuring instrument

The utility model discloses a pavement pit area measuring instrument. Based on the measuring instrument, a pavement pit is divided into a plurality of rectangles with the width of Li and the length of Di, wherein i is equal to 1, 2, 3,..., I, I is the total number of the rectangles formed by dividing the pavement pit, and the pavement pit area can be acquired by calculating the sum of the areas of the rectangles. The measuring instrument comprises a measuring device and a control device; the measuring device comprises a tool for measuring Li and a tool for measuring Di; the tool for measuring Li comprises a slide rail and a movable slide bar movably arranged in the slide rail; the tool for measuring Di comprises a sliding groove formed in the movable slide bar in the length direction of the movable slide bar, a first macrometer and a second macrometer; the first macrometer is assembled in the slide groove, and used for measuring the distance between the first macrometer and the pavement; the second macrometer