Method for controlling an antislip-regulated friction brake system of a rail vehicle or of a rail vehicle train which is composed of a plurality of rail vehicles and which has a number of braked axles, characterized by the following steps: a) subjecting at least two selected axles of the number of braked axles during braking to a braking pressure which exceeds a braking pressure corresponding to the braking request for the braking, b) measuring at least one variable representing the maximum transmittable frictional force in each case between the wheels of the selected axles and the rail, such as the wheel rotational speed, wheel circumferential acceleration, braking force, braking torque or braking pressure, c) preparing a list in which the selected axles are assigned to their respectively transmittable braking frictional force, d) identifying at least one axle with brake slip from the selected axles, at which axle, during braking, a brake slip which exceeds a predefined extent occurs and therefore the antislip regulation is activated, e) calculating lost braking work at the at least one axle with brake slip from the difference between the braking work which would have been carried out without activation of the antislip regulation at this at least one axle with brake slip and the braking work which is actually performed at this at least one axle with brake slip, f) identifying from the list at least one axle without brake slip or with a permissible degree of brake slip and by means of which a greater frictional force can be transmitted than by the axle with brake slip, g) applying the brakes at the at least one axle without brake slip or with a permissible degree of brake slip, in such a way that the braking work which is lost at the at least one axle with brake slip is at least partially compensated. a) subjecting at least two selected axles of the number of braked axles during braking to a braking pressure which exceeds a braking pressure corresponding to the braking request for the braking, b) measuring at least one variable representing the maximum transmittable frictional force in each case between the wheels of the selected axles and the rail, such as the wheel rotational speed, wheel circumferential acceleration, braking force, braking torque or braking pressure, c) preparing a list in which the selected axles are assigned to their respectively transmittable braking frictional force, d) identifying at least one axle with brake slip from the selected axles, at which axle, during braking, a brake slip which exceeds a predefined extent occurs and therefore the antislip regulation is activated, e) calculating lost braking work at the at least one axle with brake slip from the difference between the braking work which would have been carried out without activation of the antislip regulation at this at least one axle with brake slip and the braking work which is actually performed at this at least one axle with brake slip, f) identifying from the list at least one axle without brake slip or with a permissible degree of brake slip and by means of which a greater frictional force can be transmitted than by the axle with brake slip, g) applying the brakes at the at least one axle without brake slip or with a permissible degree of brake slip, in such a way that the braking work which is lost at the at least one axle with brake slip is at least partially compensated.