With the rapid development of information and communication technology, it has been widely used in employees" work and life, and its influence on employees" physical and mental health has been paid more and more attention by researchers. Based on the boundary theory, this study explores the influence mechanism of the leisure use of information and communication technology on employees" work and family conflicts, with the leisure crafting and leisure spillover as the intermediary mechanism. By analyzing the survey data of 300 employees, the results show that the leisure use of information and communication technology has a positive impact on employees" leisure crafting, leisure crafting has a positive impact on employees" leisure spillover, and leisure spillover has a negative impact on employees" work-family conflict, task conflict and relationship conflict. Leisure crafting plays an intermediary role between the leisure use of information and communication technology and leisure spillover; Leisure spillover plays an intermediary role between leisure crafting and work-family conflict, task conflict and relationship conflict; In addition, leisure crafting and leisure spillover play a chain intermediary effect between the leisure use of information and communication technology and work-family conflict. This study provides some theoretical guidance for employees to deal with conflicts at home and at work.