The Sanjiaoshan gold deposit occurs mainly in the clasolite and pelitic siltstone in Tangding group in lower Devonian system which strictly controlled by strata, faults and folds. With field reconnaissance geological survey,  this paper figures out good mineralization for gold mine in this area,  and analyzes the genesis of this gold deposit based on the information from former researchers,  and suggests that this deposit belongs to Carlin type gold deposit,  that’s a minute dissemination medium-low hydrothermal deposit with atmospheric water filtering genesis.