Based on the practical project,the author calculates the temperature stress of the 40 m diameter concrete silo in port due to season variation and in-and-out temperature difference,analyses the inner force distribution of the silo wall due to different temperature actions,and converts the temperature stress into the circular force of silo wall,and analyses the ratio of the circular force in silo wall generated by the temperature stress and stored material pressure.The results are useful for designers to correctly grasp the temperature influence on the internal force of silo wall,strengthen the structure measures and ensure the structural safety.