The Lannigou is a large gold deposit which has been known in “golden triangle” of Yunnan—Guizhou—Guangxi, and has important economic value. Ore- bodies of the Lannigou gold deposit are strictly controlled by faults and it has the typical characteristics of structural ore- control. Through detailed field observation and mechanical analysis of the associated structural evidences of major faults around the Lannigou gold deposit area, we suggest that the structural deformation characteristics are divided into extension and compression. Among them, late Paleozoic—Middle Triassic early Anisian is extensional stage, while since the middle Anisian is compressive stage, and the tectonic switch time should be shortly later than 248 Ma or 246 Ma. According to the seismic profile, LWF and QLF extend down to the metamorphic basement of Nanpanjiang basin, they may provide migration channels for ore- forming fluid. Moreover, there are geochemical anomalies and gold occurrences in the south of LWF. It’s concluded that the deep and peripheral of the Lannigou gold deposit have good prospecting potential.