Car safety lane-changing control system and method

The invention discloses a car safety lane-changing control system and method. The method comprises the steps: detecting moving objects of two adjacent lanes behind a vehicle, and sending out an early-warning signal for judging whether the lane changing is dangerous or not according to a distance between the targets and the vehicle and the azimuth and relative moving speed of the targets behind the vehicle. Specifically, radar sensors are installed at a rear left side and a rear right side of a car and used for detecting the distance from the targets to the vehicle and azimuth and relative moving speed of the moving objects on the left and right adjacent lanes behind the car relative to the car; a strategy control unit judges whether the lane changing is dangerous or not at the moment according to data information acquired by the radar sensors, if a steering light of the car is not turned on, a first type of alarming signal is transmitted, and if the steering light is turned on, a second type of alarming signal is issued. The target vehicle or an obstacle behind the local lane is judged, and a collision early warning function is realized by virtue of a visual and acoustic system. The implementation way is simple, the cost is low, the performance is stable and reliable, and the lane-changing early warning function is realized.