The invention discloses a multipurpose vehicle-mounted ground milling machine which comprises a motor-driven vehicle, milling machine tools, a dust collector, a hydraulic pressure station, a generator set and a connecting mechanism; the milling machine carries out the walking mechanization road maintenance by arranging a group of autorotation and revolution milling tools at the front end of the motor-driven vehicle, driving the milling machine tools for milling with a speed reducer, adjusting the milling depth with an elevating machine and a connecting rod adjustment mechanism, and driving the milling machine tools with the vehicle. The machine is not only used for clearing away freezing rain and snow, but also can be used for removing laitance on the ground and marker lines, carries out operations such as chiselling and the like, and has the advantages of simple structure, convenient operation, good clearing effect and high working efficiency.