The invention relates to an actuator for controlling a vehicle clutch. The actuator comprises a cam disc and a push rod, wherein the cam disc can rotate around the axis of a rotating shaft, and the push rod is supported in an axial supporting device and provided with a longitudinal axis. The axial supporting device comprises one or more supporting elements. The push rod is provided with a first end. The push rod is coupled with the cam disc at a coupling point at the first end, and thus, the push rod is driven to perform linear motion along the longitudinal axis of the push rod through rotation, around the axis of the rotating shaft, of the cam disc so that the linear motion can be transmitted to the clutch. The actuator is arranged to achieve the effect that the cam disc is required to rotate in a first rotation direction so that the clutch can be switched from the closed state into the open state. Relative to the rotating axis, the axial supporting device is arranged to achieve the effect that the longitudinal axis is spaced from a parallel axis parallel with the longitudinal axis by a distance, wherein the parallel axis intersects with the rotating axis.