Auxiliary device for detecting numerical control spindle precision

The utility model relates to the technical field of numerical control spindle precision detection. The auxiliary device is used for detecting the precision of a numerical control main shaft. Fixing rod, bottom plates are connected to the lower ends of the two fixing rods. Balancing weights are welded to the lower ends of the bottom plates. Foot pads are arranged at the lower ends of the balancingweights. First long grooves are formed in the outer sides of the fixing rods. A first cross rod is arranged in inner cavities of the two first long grooves; second long grooves are formed in the outersides of the fixing rods; threaded columns matched with the second long grooves in position are symmetrically connected to the outer side of the first transverse rod. The threaded columns penetrate through the second long grooves and extend to the outer sides to be in threaded connection with nuts. Compared with the prior art, the angle inclination monitoring device is simple in structural design, high in practicability,