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本文给出等截面抛物线两铰拱推力影响线的精确解析解，对其在工程计算中的应用进行了分析，分析表明现行工具书中关于抛物线两铰拱的分析公式用于大矢跨比拱跨中作用竖向集中力及拱脚水平位移引起的内力有不可忽略的误差。
In this paper, the exact analytic solution of the influence line of parabolic two-hinged arch thrust is given, and its application in engineering calculation is analyzed. The analysis shows that the analytical formula of parabolic two-hinged arch in the current tool book is suitable for large- In the role of vertical vertical force and arch horizontal displacement caused by internal forces have not negligible error.