大承气汤在《伤寒杂病论》中计有30多条原文论及其适应证、服用法及禁忌等。本方因其配伍严谨、用药有度、疗效卓著而被后世医家视为峰下法之典范，并在此方基础上化裁出多首大承气汤加减方，大大扩充了本方的临床主治范围，尤其在急难病症的救治方面，更显示出了独特的疗效。 Da Cheng Qi Tang included more than 30 original text articles, their indications, service usage, and taboos in “Treatise on Febrile and Miscellaneous Diseases.” Due to its rigorous compatibility, good drug use, and outstanding curative effect, this party has been treated as a model of the peak method by later physicians, and on the basis of this side, a large number of Dachengqi decoctions have been developed, greatly expanding the clinical side of this party. The range of indications, especially in the treatment of acute and difficult illnesses, shows a unique effect.