陶家嘴一号城门遗址，位于坡顶脊线垭口处，坐东朝西，依山就势建造于以石墙包边的圆角方形城台之上，平面略呈“凸”字形，由外门道、内门道、八字墙、阶梯踏道、排水暗沟等组成。内门道墙壁上贴有方形石砖，城门内堆有大量礌石。考古研究发现，该城门与宋元山城体系中已经考古发掘的城门相比，具有三大特色：一是结构完整、要素齐全，规模体量最大，保存最完整；二是城门营造方式独具特色，内门道为排叉柱结构，外门道为拱券顶结构，是我国古代排叉柱城门向拱券顶城门过渡阶段的珍贵例证；三是城门内三道封堵石墙和填埋的礌石堆清晰反映了元初毁城的历史。
The No. 1 City Gate Site of Taojiazui is located at a narrow pass of the mountain ridge on top of the slope and lying at an east-west orientation. By taking advantage of the mountainous terrain, it is built on a square platform with rounded corners surrounded by stone walls. The layout is slightly in the shape of a "凸" character, consisting of outer gateways, inner gateways, walls in the shape of character "八", step walkways, and drainage ditches. Square stone bricks are installed on the walls of inner gateways, and a large pile of big stones have been found inside the city gate. According to archaeological research, this city gate has three distinct characteristics compared with the excavated city gates in the mountain city systems from Song and Yuan dynasties. Firstly, it is structurally intact and fully equipped, with the largest scale and best preservation. Secondly, its construction style is unique—the inner gateway features a forked pillar structure while the outer gateway adopts an arch roof structure. This precious example represents a transitional phase for the city gate from forked pillar gates to arch roof structure in ancient China. Lastly, within the city gate, there are three layers of stone block walls and buried stone piles which vividly reflect the history of city destruction during the early Yuan dynasty.
