城四家子城址位于吉林省白城市洮北区德顺蒙古族自治乡古城村北部。2013~2014年,吉林省文物考古研究所对该城址内一处高于地表的建筑台基进行了主动性考古发掘,出土了大量板瓦、筒瓦、瓦当等建筑构件。该建筑台基为夯土结构,具有坚实的地下基础和台明,沿用时间较长,台基之上和周边建有不同功能的建筑和相关设施,且营建时间有早有晚。这些建筑曾有过多次局部改建、损毁,并在遭废弃一段时间后于原址之上进行重建的经历。从建筑基址结构及出土器物来看,该城址应为辽代长春州、金代新泰州。 City Si Jiazi site is located in Baicheng City, Jilin Province, North District Desheng Mongolian Autonomous Township North ancient village. From 2013 to 2014, Jilin Provincial Institute of Cultural Relics and Archeology conducted an active archeological excavation of a stationed basement above the surface of the site, and unearthed a large number of building components such as slabs, shingle tiles and tile roofs. The base of the building is a rammed earth structure with solid underground foundation and Taimin. It has been used for a long time and has different functions of buildings and related facilities on and around the base. Construction time has been late. These buildings had undergone several partial rebuildings, damaged and reconstructed on the original site after being abandoned for some time. From the construction site structure and unearthed artifacts, the site should be Liao Dynasty Changchun, Jintai new Taizhou.