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摘要 针对现行防火规范第8章第8.3.2条规定的四种加压送风防烟方案，根据气流流动特性分为两类，对表8.3.2-1，8.3.2-3以及表8.3.2-4 三种防烟方案，选择了有代表性的范例，应用当量流通面积流量分配法对10种不同的工况进行讨论，针对每个工况的4个子项分别建立数学模型，并进行数值计算；对表8.3.2-2,8.3.2-4防烟方案中的风量，按流体网络方法进行校验性计算，获得大量数据；通过以上分析计算，得到类似矩阵的数据集，形成了一个完整的优化防烟方案论据链。 关键词 　防排烟 优化 论据链 人工室外条件 Analysis and discussion on argument chain of optimizing smoke control scheme By Liu Chaoxian Abstract Based on the characteristics of air flow, divides four pressurization air supply and smoke control schemes in the item 8.3.2, Chapter 8 in the code into two kinds. Aiming at three kinds of smoke control schemes in the table 8.3.2-1,8.3.2-3 and 8.3.2-4 thereof, chooses representative examples, analyses ten different conditions by the method of flow distribution on equivalent flow area, establishes and calculates mathematic models of four subitems of each condition. Aiming at the smoke control schemes in the table 8.3.2-2 and 8.3.2-4, calculates and checks air volume parameters by hydro-network analysis method, obtains large amounts of data and a similar matrix data set, and forms a complete argument chain for optimizing smoke control scheme. Keywords smoke control， optimization， argument chain， artificial outdoor condition