The invention discloses an exciting mechanism of a vibrating roller, which belongs to the engineering machinery manufacturing field. The exciting mechanism of the invention solves defects of complex manufacturing, high cost and bad reliability of exciting mechanisms of road rollers in the prior art. A technical scheme of the exciting mechanism of the vibrating roller is mainly characterized in that: the exciting mechanism of the vibrating roller comprises a fixed eccentric block and a movable eccentric block; a limiting block is arranged in the inner cylinder of the fixed eccentric block; the movable eccentric block is arranged in the inner cylinder of the fixed eccentric block; one end of the fixed eccentric block is connected with a flange C, and the other end of the fixed eccentric block is connected with a flange D; internal parts of the flange C and the flange D are respectively provided with a blind hole; and one end of the movable eccentric block is arranged on the blind hole of the flange C, and the other end of the movable eccentric block is arranged on the blind hole of the flange D, wherein the fixed eccentric block is single-casting, the middle part is a steel cylinder, the eccentric part is a outer ring semicircular cylinder, and the movable eccentric block is a single-casting, the middle part is half-cylinder, the both ends are small cylinders. The exciting mechanism of the vibrating roller can be applied to the mechanical manufacturing industry.