Abstract: This paper established a 3D geological model of the Dayingezhuang-Caojiawa gold deposit based on 291 boreholes data, analyzed the characteristics of gold deposit in the three-dimensional space and pointed out the direction of deep prospecting.The deposit consists of four large ore bodies which mainly distributed between 0 and -1740 m elevation in the footwall of Zhaoping fault.The surface undulation of Zhaoping fault where occurred the orebodies changes obviously, showing the characteristics of steep dip in the shallow part and gradual slowdown to the deep part.Zhaoping fault and gold ore bodies are cut by later faults.The three-dimensional visualization analysis of the rehabilitated ore body from shows that the 3D thickness distribution of main ore body is not uniform, showing thick and thin alternating distribution; The distribution of the grade of the the main ore body is uniform, and the area with larger thickness also has higher grade.The correlation coefficient between the thickness and the grade is 0.352.The three-dimensional distribution of thickness × grade shows that the ore body has an obvious NEE lateral characteristic, with lateral direction of 75°.There are four enrichment mineralization sections in the deposit, and their spatial locations are consistent with the three positions where the dip angle of the fault change from steep to slow and the position where the fault has a relatively slow inclination, which formed the characteristics of step mineralization.It indicates that the variation of fault dip angle has an obvious control effect on gold precipitation and enrichment.The study and detection of fault dip Angle should be emphasized in future prospecting work.The analysis shows that the position between ①-1 and Ⅰ-2 orebody, the north of Ⅰ-2 orebody and the position along the 75° direction of ②-69 orebody all have good prospecting prospect.The research results provide an important basis for further research and deep prospecting of the deposit.