The utility model relates to a gas solid phase catalytic reactor for heat liberation reversible reaction. A continuance heat transfer cold pipe liner is in a catalysis layer; after cold air in the cold pipe liner and the reaction gas of the outside of tube of the catalysis layer cocurrent flow and heat transfer, the air mixes with the gas from the heat exchanger, and then reacts in the catalysis layer. The reactor has the advantages of superior processing performance, small catalysis layer difference temperature, high synthetic ratio, small resisting, high production capability, convenient operation regulation and simple and reliable device structure.