Abstract: The Laojunmiao gold mine in Xunyang, Shaanxi Province represents a recent discovery of a microdisseminated gold mine. The occurrence state of gold in gold ore was studied, and it was found that gold mainly exists in the form of ultra-microcoscopically encapsulated nano-gold. The occurrence state of gold is mainly gold in sulfide (pyrite) (45%), followed by gold (29.51%) in quartz, silicate minerals (siliceous clasts, gravel), natural gold (17.65%), gold in carbonate minerals (calcite) (7.84%), and the main gold-bearing mineral is pyrite.