Abstract: The actions and effects of temperature loads on giant reinforced concrete circular coal silo are not precisely specified in technical references and relevant standards of design. It is investigated the structure behavior of reinforced concrete circular coal silo(with a diameter of 120m and a capacity of 100 kilo-tons) subjected to temperature loads. The temperature loads individually assumed to act on the coal silo without nothing and fully laden silo. And compared the stress state of the silo on temperature load with that of the one on stored material pressure. The investigation reveals that temperature load has a great effect on the stress state of the silo; the annual stresses in the wall of the silo caused by temperature load are six times larger than that of the one caused by the stored material pressure; when the temperature steps down,the annual stresses are much larger as compared with the situation of temperature goes up; the axial stress in the wall of the silo is not so obviously influenced by temperature load or by material pressure. Finally,after analyzing The Code for Design of Reinforced Concrete Silos (GB 50077-2003), several advices are presented which are very important to the design and practice of reinforced concrete silos.