Abstract: It is a difficult problem in the field of aerodynamics to reconstruct the global Cp val-ues on the whole surface using some scattered Cp values located on the surface of an aircraft given by wind tunnel test．In this article，a new algorithm is presented．The algorithm is finding a regular surface that is topologically equivalent to the irregular aircraft surface followed by interpolating smoothly those scattered data by using radial basis functions．Then，the global Cp values are evaluated．The results of many test functions and applications to the aircraft proved that the method is simple and effective．