The invention discloses a paper tape tension control device for an automatic paper receiving machine. The paper tape tension control device comprises a support and guide rolls, wherein a buffer roll is arranged below the middle of the first guide roll and the second guide roll; the buffer roll is composed of guide rails, the third guide roll and bearings; slide blocks capable of moving back and forth along the guide rails are arranged on the guide rails; the two ends of the third guide roll are installed on the two guide rails through the bearings respectively; a distance between the first guide roll and the second guide roll is equal to the sum of a diameter of the third guide roll and double of a thickness of a paper tape; downward vertical rods are fixed on the two slide blocks; a cross rod is arranged between bottom ends of the two vertical rods; hooks are arranged on the cross rod; counter weights can be suspended on the hooks; and the counter weights are a plurality of blocks having different fixed masses. The paper tape tension control device disclosed by the invention is simple in structure, greatly reduces the manufacturing cost of production equipment, and effectively ensures that a tension of the paper tape is always maintained at a constant value; and moreover, the value of the tension can be adjusted according to the actual needs.