The invention discloses a front-vehicle anti-collision early warning system and a control method of the system. The front-vehicle anti-collision early warning system comprises an image acquisition unit, an image operation module, a first data communication unit, a second data communication unit, a data processing unit, a data judgment unit, a data classification unit, a first display and warning unit and a second display and warning unit. The control method includes the following specific steps of firstly, data acquisition, secondly, data processing, and thirdly, warning of different vehicle distances and warning of different danger levels. By the adoption of the system, visual warning and auditory warning signals at different levels can be given according to the danger levels of front vehicles, so that a driver is reminded to pay attention to the road condition or take measures, visual and auditory information prompts of different distance segments can be given according to the relative vehicle distances of the front vehicles, so that the driver is reminded to keep the vehicle distance, accidents are avoided, and life and property safety is guaranteed; and the whole system is simple in structure and low in cost, and the real-time performance of the system is improved.