Slope detection device for building main body

The utility model provides a building main body gradient detection device which effectively solves the problems that in the prior art, when gradient parameters are measured, the ground gradient can be determined only through multiple times of measurement, zero setting is needed frequently, and a mechanism is complex and inconvenient to carry. According to the technical scheme, the device comprises a horizontally-arranged circular ring, a plurality of supporting rods are fixed to the periphery of the circular ring, a small ball is placed in the circular ring, scales are arranged on the surface of the small ball, the small ball can rotate in the circular ring, and the upper end face of the circular ring and the sphere are located on the same plane. A balancing weight is arranged below the small ball and is connected with the bottom of the small ball through a rope; the device is ingenious in structure, the inclination direction of the gradient can be obtained at a time through the ball with the scales, operatio