Based on Chinese local culture context, this study explores the influence mechanism of family supportive supervisor behavior (FSSB) on employee helping behavior, and examines the mediating effect of family-like exchange relationship and the moderating effect of employee traditionality. Using a questionnaire survey, the study finds that FSSB has a positive effect on employee helping behavior, which is completely mediated by family-like exchange relationship. Meanwhile，the study also finds that employee traditionality can enhance the positive effect of FSSB on family-like exchange relationship and the mediating effect of family-like exchange relationship on the relationship between FSSB and employee helping behavior, which means that the higher level traditionality the employee is, the stronger the mediating effect of family-like exchange relationship becomes.