“下法”是中医治病内服八法之一。它是一种攻逐体内积滞的方法。可分寒下、温下、润下、峻下等几类,分别用于实热、寒积、燥结和肿满等证。本文根据中医对实热、寒积和燥结证形成的病因、病机的认识,复制了三种病理模型,并比较几个下法代表方剂对上述几种模型的治疗效果。其中,寒下方以大黄牡丹汤为代表;温下方以三物备急丸为代表;润下方以脾约麻仁丸为代表。 “Following the law” is one of the eight methods used by Chinese medicine to treat diseases. It is a method of attacking the accumulation of the body. Can be divided into cold, warm, Runxia, ​​Junxia and other categories, respectively, for real heat, cold plot, dry knot and swollen and other cards. Based on the understanding of the cause and pathogenesis of heat, cold accumulation and dryness syndrome formation in traditional Chinese medicine, this article reproduces three pathological models and compares the therapeutic effects of several prescriptions on the above models. Among them, the cold below the representative of the rhubarb peony soup; temperature below the three objects prepared emergency pill as the representative; Run below the spleen about Maren Pills represented.