Light auto front axle having pneumatic disk type brake

The utility model relates to a front axle of a light auto with a pneumatic disk type braking device. The utility model comprises a front shaft, and a steering knuckle assembly hinged with the front shaft through a main pin. The utility model is characterized in that the steering knuckle assembly has a connecting plate, and a brake clamp of the pneumatic disk type braking device is fixed on the connecting plate through screw bolt assemblies. A brake disk is together connected with a front wheel hub through screws. The utility model has the advantages that the braking performance of the light auto is enhanced, and the structure of the light auto is simplified. The weight of the light auto is lowered, and thus, the light auto can run in security.