Social work originates from voluntary and charitable activities，so it is always considered unprofessional and unscientific.Therefore，in order to improve its professional and scientific level，social work embraced the professionalism as soon as it was founded，it introduced and developed scientific theories and methods actively.However，professionalism caused the de-socialization of social work when it promoted the professional and scientific standard of social work.Specifically，the social work guided by professionalism was addicted to case work and individual therapy，abandoned“social”mission of social reform and social justice simultaneously.The reason is that scientific theories and techniques can be fully used in case work，which accords with the professionalism's“science”requirement.In addition，case work is helpful to improve the economic income and social prestige of social work，which can satisfy social workers'“interest”demand.Under the background of prevalence of professionalism，how to get back the“social”essence of social work has became a major issue that must be considered by professional world.