Land gradient measuring device

The utility model discloses a land gradient measuring device which comprises a placing plate, mounting shafts are symmetrically and fixedly installed on the front side and the rear side of the placing plate, rotating plates are rotationally connected to the two mounting shafts, a mounting block is fixedly installed on the top of each mounting shaft, a protractor is fixedly installed on the front side of each mounting block, and the protractor is fixedly installed on the rear side of each mounting block. Pointers are fixedly installed on the front sides of the rotating plates, a connecting rod is arranged between the two rotating plates jointly, penetrating grooves are formed in the bottom sides of the interiors of the rotating plates, extending plates are slidably connected into the penetrating grooves, and the two ends of the connecting rod are inserted into the two penetrating grooves correspondingly and fixedly connected with the extending plates. A first sliding groove is formed in the position, correspon