Road slope measuring instrument and measuring method

The invention provides a road gradient measuring instrument and measuring method.The measuring instrument comprises a base, a leveling assembly, a gradienter and an angle measuring assembly, and the leveling assembly is movably connected with the base and used for adjusting the levelness of the base; the gradienter is arranged on the base and is used for detecting whether the base is horizontal or not; the angle measuring assembly comprises an angle dial and a free droop pointer, the angle dial is fixedly arranged at the top of the base, and the free droop pointer is rotatably arranged at the circle center of the angle dial. When the measuring instrument provided by the invention is used for measuring the slope of the road, the slope angle of the road can be measured through the operation of leveling the base twice, and then the slope is calculated by utilizing a tangent function, so that the measuring instrument is simple, rapid and efficient to operate, and meanwhile, accumulative errors caused by length me