The invention discloses a circular saw web and a damping noise reduction structure thereof, and belongs to the technical field of cutting equipment. The circular saw web and the damping noise reduction structure solve the defect that in the prior art, a traditional circular saw web is large in noise. A body structure of the circular saw web comprises a saw web base, the saw web base is provided with a first blind hole, a first through hole and the damping noise reduction structure, a first cylinder is installed in the first through hole, and the first cylinder is in interference fit with the first through hole; and a first damping thin sheet is installed in the first blind hole, a gap is reserved between a first arm face on the first damping thin sheet and a second arm face of the first blind hole, and a gap is reserved between a first plane on the first damping thin sheet and a second plane on the first blind hole. The circular saw web and the damping noise reduction structure are mainly used for cutting equipment.