Digital display gradient measuring scale used on map

The utility model discloses a digital display gradient measuring scale used on a map, which comprises a fixed rotation support leg and a movable rotation support leg, and the fixed rotation support leg and the movable rotation support leg are hinged through a damping rotating shaft; a miniature distance sensor is installed at the end, close to the map, of the movable rotation supporting leg and used for detecting the distance between the free end of the movable rotation supporting leg and the free end of the fixed rotation supporting leg. A digital display device is further arranged on the fixed rotation supporting leg; an input module is arranged on the digital display device and is used for inputting height difference parameters; a calculation module is arranged in the digital display device, the calculation module is connected with the distance sensor, the calculation module is used for calculating the gradient according to the distance measured by the distance sensor and the height difference parameter in