ASCE 74—2009《美国输电线路结构荷载指南》已被许多国家采用和借鉴，了解其内容对我国的电力建设以及参与涉外工程具有重要意义。风荷载是输电塔设计的控制荷载，掌握我国规范与ASCE 74—2009风荷载计算方法的区别对输电塔的设计非常必要。介绍了我国规范与ASCE 74—2009的输电塔风荷载计算公式，比较了基本风速、风压高度变化系数、体型系数、风荷载调整系数、地形影响因子、覆冰风荷载增大系数和斜向风荷载计算方法等参数的计算差异，为输电工程技术人员提供参考。

《Guidelines for electrical transmission line structural loading》(ASCE 74—2009) is widely applied and used for reference in many countries over the world, which is very important to the electric power construction in our country and foreign projects. Wind load is the control load for transmission tower. So it is necessary to master the differences of wind load computation methods between Chinese code and ASCE 74—2009. This paper introduced the wind load computation formula for transmission tower by Chinese code and ASCE 74—2009, and detailedly compared the differences of basic wind speed, height variation factor of wind pressure, shape factor, wind load factor, topographic factor, icing load factor, yawed wind load computation method and so on. The results can be used as a reference for the technicians of transmission line engineering.