Abstract: Curve fairness is an important issue in CAD/CAM. This paper begins with a discussion of the existing optimization models for curve fairness, followed by design of a novel optimization model for curve fairness with the method of smoothing initial data directly. An evolutionary programming algorithm is presented to solve the optimization problem in curve fairness, with satisfactory results achieved. Theoretical analysis and calculation examples show the effectiveness of the optimization model proposed in this paper for curve fairness.