本文通过对全断面隧洞掘进机盘形滚刀的受力分析,导出了滚刀所受轴向力的计算方法。用此法确定的数值与多次现场实测结果完全吻合,对现场实测中轴向力差异大及不为零的原因作了正确说明,从而为正确选用盘刀轴承提供依据。 In this paper, through the analysis of the force of disc cutter in full face tunneling machine, the calculation method of the axial force of hob is derived. The numerical values ​​determined by this method are in good agreement with the results from many on-site surveys, and the reasons for the large and non-zero axial forces in field measurements are correctly described to provide the basis for proper selection of disc knife bearings.