The invention discloses a car curve collision avoidance and stability system coordination control method based on V2X car networking. The method comprises the following steps that 1, the curve car traveling information collected by a V2X car networking system and a vehicle-mounted sensing system is obtained, the running speed Vf of a front car, the relative distance Drelative between the front car and the rear car, and the curve radius R are obtained by the V2X car networking system, and the running speed Vr, the actual yaw velocity r and the front wheel steering angle [delta]f of the car are obtained by the vehicle-mounted sensing system; 2, the curve car traveling information is analyzed, and a car curve collision avoidance safety distance equation is built; 3, the curve car traveling information is analyzed, and a car expected yaw velocity equation is built; 4, solution computation is conducted on the built car curve collision avoidance safety distance equation and the built car expected yaw velocity equation, so that the curve collision avoidance early warning distance Dw, the curve forced brake distance Db and the expected yaw velocity rd are obtained; and 5, according to the results obtained in the step 4, the car curve collision avoidance and stability system coordination control method is designed. The safety and stability are improved remarkably.