“密白”是在宋朝官制混乱、官员扯皮、效率低下的情势下出现的一种独特的军事文书处理方法,包括“枢密院既得旨”、“例不送中书”、“书黄过门下”三个流程,具有军事监督作用。“密白”提高了军事决策的科学性,但在实施的过程中也滋生了不少弊端,影响了国家的改革和发展。 “Secret White ” is a unique method of dealing with military documents that emerged in the midst of official chaos, bureaucratic wrangling and inefficiency in the Song dynasty, including the “Privilege of the Privy Council”, “ ”Yellow book under the door “ three processes, with military supervision. The ”secret white" has improved the scientific nature of military decision-making. However, it has also brought a lot of drawbacks in the course of its implementation and has affected the country’s reform and development.