Abstract: Yingzuishan gold deposit lies in the intersection point of North Qilian Mts and South Altyn abruption,it is related to the ultram afite nearly in space.By studying the geology of the deposit,a scertained the deposit's geology backg round and mineralization characteristics,and analy sed minerelization material source according to the geology,REE,stable isotopes and fluid inclusion.The authors believe that the mineralization material of the deposit derived from ultram afite chiefly,its genesis type is cryoultrabasic alteration rock type,and it is another important kind of gold deposit in North Qilian Mts1 area.