The invention relates to a method for determining a circular curve radius of a road and a driving sight distance based on GPS motion camera data. A GPS point coordinate point of a driving track is transformed into a corresponding two-dimensional orthogonal coordinate; according to the geometrical principle, calculation is carried out by using each three coordinate points as one group successively to obtain track line radiuses, wherein the mode of the multiple path radiuses is a circular curve radius of a corresponding lane; and then a road circular curve radius is obtained based on a corresponding position relation. Track lines moving to a road central line are moved left and right in a translation manner at distances being the half of the roadbed width; after the translation, track points fall at edges lines of the pavement; and a sight distance is calculated by using the conventional measuring method. The method has high advancement and exploitativeness. When the method is implemented, normal traffic of the road is not affected, so that the field working time can be shortened, the measuring efficiency can be improved, and the needed manpower and materials can be reduced.