The present invention is to provide a clutch-type electric generator for automobile axles which comprises a casing, a stator housing having a plurality of stators fixed therein, a rotor housing movably configured around the axle and having a plurality of rotors fixed therein, and a clutch mechanism. The axle penetrates the casing and rotates with respect to the casing. The clutch mechanism comprises a passive ring, a clutch disc fixed around the axle and a plurality of clutch shoes; wherein the clutch shoes can be centrifugally moved between the clutch disc and the passive ring via a plurality of connecting rods and elastic devices, and can engage with the passive ring fixed on the rotor housing for enabling the rotors to simultaneously rotate along with the axle and to rotate with respect to the stators to generate induced electricity while the automobile has reached a predetermined speed.