To study the law of body weight change of Glucocorticoid rats ,The Grey model GM (1, 1) was used to analyze and forecast the change of the rats bodyweight.

• 长期应用糖皮质激素可造成大鼠的体重明显下降,本文用生理盐水作对照,应用灰色系统的GM(1,1)模型,对长期灌用泼尼松的大鼠体重变化进行分析和预测,从而探讨糖皮质激素对大鼠体重变化的影响规律。