The invention aims to disclose a balance frog tamper comprising a chassis. A head rack is disposed in the front of the chassis. A head is disposed below the head rack. A transmission device is disposed on the head rack and is provided with a reduction wheel. The reduction wheel is connected with a middle wheel on the chassis through a V-belt. The middle wheel is connected with a motor through another V-belt. The balance frog tamper is characterized by comprising first and second eccentric blocks arranged on the transmission device. The first and second eccentric blocks are symmetrically disposed on the transmission device. The balance frog tamper has the advantages that the eccentric blocks are arranged on the transmission device, operating noise of the frog tamper is reduced effectively, and labor is less intensive for workers; rollers are mounted on the chassis of the frog tamper, so that mobility of the tamper is improved effectively.