针对建筑工程中常用的钢筋混凝土扩展基础，提出了直接用基底偏心矩计算基底尺寸的方法，同时扩展了其适用范围与现行的系数增大法相比，该方法具有计算简单、明确、使用方便等优点，并易于编成计算机程序，与通用的建筑结构设计软件连接 Aiming at the base of reinforced concrete commonly used in construction engineering, a method of calculating the size of the base directly using the eccentric moment of the base was proposed and its applicable scope was expanded. Compared with the existing coefficient increasing method, this method is simple, clear, and easy to use. Such advantages, and easy to program into a computer program, and general architectural structure design software connection