With the intensification of market competition, organization gradually expects employees' proactive behavior to help organization cope with market changes.Therefore, the research of proactive behavior is helpful to deepen our understanding of it.In view of this, the paper defines the connotation and dimensions of proactive behavior based on previous literature, organizes the latest research results on the mechanism of employees' proactive behavior from three aspects: antecedent, intermediary and regulation, finds out the shortcomings in the current research field, and looks forward to the future development of the research.