The Canzhuang Gold Deposit is a significant "Jiaojia‑style" fractured‑altered rock‑type deposit locatedin the northwestern Jiaodong Peninsula. The Dongzhuangzi Fault is one of the most important ore‑controlling faults inthe mining area. However, its structural characteristics and ore‑controlling patterns remain poorly understood, limitingthe prediction of deep and peripheral mineralization. Based on systematic underground tunnel geological surveys andstructural occurrence measurements, this study identifies the geological features of the Dongzhuangzi Fault and summa‑rizes the structural ore‑controlling patterns of the Canzhuang Gold Deposit. Results show that the Dongzhuangzi Faultstrikes 40°-70°, dips to the NW at 25°-35°, and exhibits tensile‑shear and dextral strike‑slip characteristics during theearly mineralization stage under NE‑oriented compressive stress. In the late mineralization stage, the fault demonstratesa shearing‑dominated behavior with NW‑oriented extensional features. The orebodies controlled by the fault show apattern of periodic enrichment, with mineralization occurring near flexures of the fault in a quasi‑equidistant distribution.The fault exhibits gentler dips on the NE side and steeper dips on the NW side. The orebodies controlled by the faultplunge northwestward along the main fracture surface at an angle of 30°-50° , and both mineralization intensity andscale decrease with depth. The mineralization and alteration occurrence of the Dongzhuangzi Fault is consistent withthe mineralization and alteration zones of the Xincheng Gold Deposit. This suggests that the Dongzhuangzi Faultand Jiaojia Fault share a common deep‑source ore‑forming fluid, with the Jiaojia Fault’s deep fluids migrating into theDongzhuangzi Fault. It is proposed that the previously termed "Dongzhuangzi Fault" within the Canzhuang Gold Depositmay represent a principal branch of the Jiaojia Fault, indicating significant mineralization potential.