Based on samples from more than 300 new employees, an empirical research is conducted to test the impact of organizational socialization tactics on newcomer adjustment, and examine how proactive behavior and newcomer type moderate the relationship between socialization tactics and newcomer adjustment. The empirical results show that institutionalized socialization tactics are more positively related to newcomer adjustment on the graduates than on the experienced job transferers, the proactive behavior of newcomer moderates the relationship positively between socialization tactics and their adjustment. Moreover, the interaction of proactive behavior and newcomer type have moderating effects on the relationship between organizational socialization tactics and newcomer adjustment.