Baizhangzi Gold Deposit is a typical magmatic hydrothermal gold deposit.In the past,the main mining object of Baizhangzi Gold Mine is gold-bearing quartz vein type gold ore bodies.However,with more prospecting projects joining in,alteration granite type gold deposits are found and have become the main mining object of the mine.The paper re-summarized and re-assessed the hydrogeology,engineering geology and environment geology in the mining district,and concluded that the complexity of the mining technical conditions is in medium class.The technical conditions have been becoming more complex over the years because of the ore body type shift,in a process from simple type to Ⅱ-2 type,and further from Ⅱ-2 type to Ⅱ-4 type.