目前《混凝土结构设计规范》（ＧＢＪ１０－８９）关于梁裂缝宽度计算公式涉及系数较多，计算繁琐．针对矩形截面梁的特点，对配筋率、钢筋直径及保护层厚度等影响梁裂缝宽度的主要因素进行了讨论，给出了相应的简化计算公式，通过对３个算例的结果比较得出，简化公式与原始公式之间的误差在５％以内 At present, the “Code for Design of Concrete Structures” (GBJ10-89) relates to the calculation formula of beam crack width, which involves many factors and is computationally complicated. For the characteristics of rectangular section beams, the main factors affecting the crack width of the beam, such as the ratio of reinforcement, the diameter of the steel bar, and the thickness of the protective layer, are discussed. The corresponding simplified calculation formulas are given and compared by the results of the three examples. The error between the simplified formula and the original formula is within 5%