The invention discloses a carbon waste heat boiler structure and provides a two-channel carbon waste heat boiler which is compact and reasonable in structure, low in manufacturing cost, safe and reliable. Through the two-channel carbon waste heat boiler, the problems that materials are wasted seriously and a boiler is hard to maintain and high in manufacturing cost and using cost due to the largeoverall height of the boiler in the prior art are solved. The two-channel carbon waste heat boiler comprises a boiler barrel and a vertical channel arranged on the lower portion of the boiler barrel.The vertical channel is provided with a flue gas inlet and a flue gas outlet. A vertical partition board is arranged at the bottom of the interior of the vertical channel. A low-temperature superheater and a high-temperature superheater are arranged on the portion, corresponding to one side of the vertical partition board, of the interior of the vertical channel from top to bottom in sequence. Aneconomizer, a finned tube evaporator and a light tube evaporator are arranged on the portion, corresponding to the other side of the vertical partition board, of the interior of the vertical channel from bottom to top in sequence. The flue gas inlet is formed in the corresponding position, located below the high-temperature superheater, of the vertical channel. The flue gas outlet is formed in thecorresponding position, located below the economizer, of the vertical channel.