本文对微动疲劳中的力学参数作出了研究。微动接触面上的力学参数可分为应力状态参数（SSP）和微动磨损参数（FWP）两类，并将应力状态参数综合为当量应力σ-1E,而将微动磨损参数用摩擦功W来表示．对桥式微动疲劳试件和燕尾型榫联接试件的数值分析表明，在微动接触面上疲劳断裂处的σ-1E和W值较大。因此，有可能使用了σ-1E和W值作为预测微动疲劳失效的两个基本参数。 In this paper, fretting fatigue in the mechanical parameters have been studied. The mechanical parameters on the fretting contact surface can be divided into two categories: stress state parameter (SSP) and fretting wear parameter (FWP), and the stress state parameters are integrated into the equivalent stress σ-1E, while the fretting wear parameters are calculated by frictional work W to express. The numerical analysis of the bridge fretting fatigue specimen and the dovetail tenon joint specimen shows that the σ-1E and W values ​​of the fatigue fracture at the fretting contact surface are larger. Therefore, it is possible to use σ-1E and W values ​​as two basic parameters for predicting fretting fatigue failure.