The invention discloses a high-precision heliostat curved surface adjusting and correcting device. The high-precision heliostat curved surface adjusting and correcting device is used for detecting the angle of a sub mirror of a heliostat. The high-precision heliostat curved surface adjusting and correcting device is provided with at least one angle detector, an adjusting jaw and a control computer, wherein the adjusting jaw is used for adjusting the angle of the sub mirror of the heliostat. When the high-precision heliostat curved surface adjusting and correcting device works, the orthographic projection of the angle detector on the sub mirror of the heliostat is located at the geometric center of the sub mirror of the heliostat, the angle detector emits parallel laser beams to the geometric center of the sub mirror of the heliostat of which the angle is to be adjusted, receives laser beams reflected by the sub mirror and analyzes a light return angle, and then the angle of the reflecting surface of the sub mirror is obtained through the law of reflection. The control computer controls the adjusting jaw to adjust the angle of the sub mirror according to the angle of the reflecting surface of the sub mirror. The measurement precision is high, and system requirements can be completely met due to the fact that detection precision of the high-precision angle detector can reach +/- 0.005 degree.