Based on the theory of social exchange, this study has probed the mechanism of the influence of the humble leadership on reactive innovation behavior, and has constructed a moderated mediation model. Through statistical analysis of 230 employee data collected in stages, the research results show that: (1) The humble leadership has indirect negative effect on reactive innovation behavior through the mediating role of affective commitment. (2) The leader identification has positive moderating effect on the positive relationship between the humble leadership and affective commitment. (3) The leader identification has positively moderated the mediating effect of the affective commitments between the humble leadership and the reactive innovation behavior, which is manifested as a moderated mediation model: the higher the leader identification, the stronger the mediating role mentioned above, and the weaker if it is the opposite.