The invention relates to an automobile fan clutch with a force amplifier. The automobile fan clutch comprises a drive torque input mechanism, a power transfer mechanism and a force amplifying mechanism, wherein the force amplifying mechanism is used for connecting the drive torque input mechanism and the power transfer mechanism, and amplifying the acting force between the force drive torque input mechanism and the power transfer mechanism. The automobile fan clutch is characterized in that the force amplifying mechanism comprises a driven plate, a driving plate, at least three first groove lanes, at least three second groove lanes and a steel ball; the driving plate is opposite to the driven plate; the at least three first groove lanes are formed in the driven plate; the at least three second groove lanes are formed in the driving plate and correspond to the first groove lanes; the steel ball is arranged between the first groove lanes and the second groove lanes; the depths of the first groove lanes and the second groove lanes are gradually reduced from the middle part to two ends. Compared with the prior art, the automobile fan clutch has the advantages that the size and calorific value of an electromagnetic coil are greatly reduced, and the weight, volume and calorific value of the product are greatly reduced.