The invention discloses a carrier roller arrangement structure for a horizontal bending belt conveyer. A carrier roller set arranged below a conveyer belt comprises buffer carrier rollers, flat carrier rollers and groove type rollers, wherein turning carrier rollers are arranged on the turning position of the conveyer belt, the turning carrier rollers are of a groove type carrier roller structure, the outer-side rollers are higher than the inner-side rollers of the turning carrier roller, and the outer-side rollers and the inner-side rollers are provided with gears matched with a side chain; at the position of turning, and the ratio of the turning radiuses of different positions of the conveyer belt is equal to the ratio of the radiuses of the carrier rollers corresponding to the conveyer belt in position. The carrier roller arrangement structure for the horizontal bending belt conveyer is bendable, reliable in operation, low in power consumption and high in conveying line adaptability.