城四家子城址位于吉林省白城市洮北区德顺蒙古族乡南4.5千米处,为一处辽金时期的州城遗址~([1])(图一)。为配合城四家子城址的大遗址保护工作,并为保护规划的制定提供考古学依据,2013年,吉林省文物考古研究所对该城址北门进行了主动性考古发掘~([2])。城四家子城址平面呈较为规整的长方形,北城门址位于城址北墙中部略偏东处,东距城址东北角514米,从位置及规模看,应为该城的主城门(图二)。发掘前此门址 The site of Chengsijiazi is located at 4.5 km away from the Mongolian nationality of Deshun, Chengbei District, Baicheng City, Jilin Province, and is the site of a state town of Liao and Jin dynasties ([1]) (Figure 1). In order to support the site protection work of the Shijiazi site and provide archaeological evidence for the protection planning, in 2013, Jilin Provincial Institute of Cultural Relics and Archeology conducted an active archaeological excavation of the north gate of the city site ([2]) . The four cities of Shijiazi are relatively regular rectangles. The north gate site is located slightly east of the central north wall of the city site and is 514 meters to the northeast corner of the east site of the city. From the perspective of location and scale, it should be the main gate of the city two). Discover this site before