Several potential failure modes may occur when mechanical components fail, and they have several correlation in some way. For that the conditions of times of load action have an impact on the reliability of mechanical components. Thus it is necessary to take all the failure modes and times of load action into account when analyzing the mechanical reliability sensitivity. Combining the order statistic theory to study the influence of times of load action on the reliability and sensitivity calculation, and applying the probabilistic perturbation method, the research built a reliability calculation model of mechanical components with multiple failure modes and times of load action modes using the stress-strength interference mode. The calculating formulas of reliability sensitivity with respect to the mean and variance of random variables were derived with the gradient method. According to the result of the torque axis reliability sensitivity analysis, the curves of reliabilities and sensitivities can be obtained, and the production can be very useful if it is extended to correlated area of machine sensitivity design.