ＧＲＥＣＯ技术是目前分析高频区复杂目标雷达散射截面（ＲＣＳ）最有效的方法之一。对复杂目标而言，应用ＧＲＥＣＯ方法的一个重要工作就是对目标的几何造型进行准确地建模，这样才能获得令人满意的结果。本文结合ＣＲ样条建模理论，利用（Ｇ１，Ｋ＝１）几何样条及其张量积曲面，阐述了在ＷｉｎｄｏｗｓＮＴ环境下利用ＶＣ４０与ＯｐｅｎＧＬ为ＧＲＥＣＯ方法进行建模的机制。 GRECO technology is currently one of the most effective methods for analyzing complex target radar cross sections (RCS) in high frequency areas. For complex targets, one of the important tasks of applying the GRECO method is to accurately model the geometry of the target in order to achieve satisfactory results. Based on CR spline modeling theory and using (G1, K = 1) geometric splines and their tensor product surfaces, this paper describes the mechanism of modeling GRECO using VC40 and OpenGL in Windows NT environment.