推导了置于鞍型支座上带有支承环钢管的计算公式。为了与我国《水电站压力钢管设计规范》（ＳＤ１４４－８５）一致，在公式推导中考虑了支承环断面重心轴的影响，并指出文献［１］中公式的错误。 The formula for calculating the steel pipe with support ring placed on the saddle bearing is deduced. In order to be consistent with the “Code for Design of Penstocks” (SD144-85) in our country, the influence of the center of gravity axis of bearing ring is taken into account in formula derivation, and the error of the formula in [1] is pointed out.