The report analyses the data of supply and demand from employment agencies as well as 600 sampling enterprises’ supervision in employment，with emphasize on the difficulties of employment in phases. The research indicates that the arising of difficulties in employment is not just the result of contradiction in labor’s supply and demand，but also lack of the supply of effective labors and insufficient efficiency of human resource market allocation. After all，enterprises whose sustainable development ability are inadequate become the inherent key factor of such difficulty. Hence，this paper makes some countermeasures through revealing the relationship between enterprises sustainable development ability and difficulty in recruitment.