Based on Role Theory, the research explored the mechanism and boundary conditions of mobile technology usage for work on employees’ work-family conflict through 253 valid employee samples collected in three stages. Research results shed light on the following findings: the use of mobile technology for work could not only directly increase employees’ work-family conflict level, but also indirectly aggravate conflict level through role overload. Organizational support could weaken the positive relationship between the use of mobile technology for work and role overload. At the same time, it weakens the mediating effect of the use of mobile technology for work on work-family conflict through role overload.