Geo-electrochemical measurements using the absorption-electricity extraction method were carried out in the Yunxi deposit of the Hetai gold mine to obtain more gold reserves. The result shows that test values of gold above the known auriferous mylonitized zone are higher than that of the county rocks. The geo-electrochemical anomaly characteristics are similar to those above the auriferous mylontized zone. It was predicted that the mylonitized zone No.19 may extend to the west of the Yunxi deposit, and the belt with abnormally high geo-electrochemical values east of line No.25 is a potential area to find ore bodies.