Combined with the understanding of the concrete structure design code,analyzes the span-depth ratio and shear span ratio on concen-trated load of the reinforced concrete deep flexural beam under the action of the influence of shear performance. Introduce foreign codes by ben-ding beam shear design of strut-and-tie model. By 163 members are no abdominal muscle in the analysis of the shear bearing capacity found China specification of bending formula be conservative,American standard be unsafe,Canada specifications conform to the actual.%结合对混凝土结构设计规范的理解，分析了跨高比和剪跨比对集中荷载作用下的深受弯钢筋混凝土梁的抗剪性能的影响，介绍了国外规范深受弯梁抗剪设计的拉压杆模型的原理，结合各国规范的具体内容，对163根无腹筋深受弯构件进行了抗剪承载力的分析，得出中国规范深受弯公式偏于保守，美国规范偏于不安全，加拿大规范较为符合实际。
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