Abstract: The present invention relates to a brake control system for vehicles with hydraulic brakes, for preventing wheel blocking and/or spinning. The system is characterised in that the brake system is separable, by means of a valve (3), one for each wheel, into a primary circuit (4) and a secondary circuit (5). Sensors (6) are provided on each wheel for sensing the rotational speed thereof. A control device compares the speeds sensed by said sensor. In the event of a sensed abnormal condition (wheel blocking or spinning) of one or more wheels, the control device activates the respective valve. A pressure control system in the respective secondary circuit controls the pressure therein, independently of the pressure in the primary circuit, in order to cancel the abnormal condition of the corresponding wheel.