2009年6月-7月,配合昌图县四面城城址维修工程,由辽宁省文物考古研究所主持,昌图县文物管理所配合,对四面城城址东北角(北墙东段和东墙北段)局部进行考古发掘。在不破坏墙体的前提下,在北城墙和东城墙分别开2条探沟,通过发掘得到北城墙和东城墙的部分数据,确认北、东城墙均为平地起建,城墙墙体有明显经过夯筑的迹象,除整层夯筑外,东城墙局部墙体有东西两侧同筑并对接而成的现象,并通过数学方法计算出城墙东北角缺失部分的数据。本次发掘弄清了城墙东北角处墙体的具体范围、走向、现存宽高等,为四面城东北角的文物保护工程提供翔实数据。另外,依据文献资料对四面城的建制沿革进行了简要的考述。 June 2009-July, with Changtu County, surrounded by four city site maintenance project, chaired by the Liaoning Provincial Institute of Cultural Relics and Archeology, Changtu County Cultural Relics Management Office, the four walls of the city northeast corner of the site (the eastern wall of the north wall and east wall north Paragraphs) Local archeological excavations. Under the premise of not destroying the wall, two ditches are respectively opened in the north wall and the east wall, and some data of the north wall and the east wall are obtained by excavation to confirm that the north wall and the east wall are all built in the ground and the walls of the wall are obvious After ramming signs, in addition to the entire rammer, the east wall of the wall with the East and West both sides of the same building and docking phenomenon, and through mathematical methods to calculate the missing part of the northeast corner of the wall of the data. The excavation to clarify the wall at the northeast corner of the wall at the specific scope, direction, the existing width and width, etc., for the four corners of the city northeast corner of heritage protection project to provide detailed data. In addition, based on the literature and information on the history of the city around the building a brief examination.