In view of the turnover rate of IT staffing becoming more and more high in recent years, how to find out the resignation motivation and propose the targeted solutions strategy for the IT staffing personnel, becomes an important issue facing the development of IT outsourcing companies. Based on 1,400 resignation interviews records of IT staffing personnel, the resignation motivation of the job occupation cycle and age variation was studied by using the content analysis methodology to study the resignation motivation factors for the IT staffing personnel, and mining the underlying causes for the turnover of IT staffing personnel. The results could be used for the IT outsourcing company to provide psychological counseling and employment-related policy interventions for the IT outsourcing staff, and could also provide macro policy guidance for the development of IT outsourcing industry in China.