Abstract: Presplitting blasting is a commonly used technology in metal mine,which can weaken the rupture of surrounding rock,weaken the destructive effect of blasting vibration on the slope of openpit mine,and maintain the stability of slope.In order to solve the problem of poor effect of presplitting blasting in water bearing area of Barun Iron Mine,based on the field geological survey and theoretical analysis,the optimization study of presplitting blasting parameters in water bearing area of Barun iron mine is carried out,and the ideal hole network parameters are obtained.The blasting effect is very ideal,which ensures the stability of the slope,and provides strong support for the presplitting blasting in the water bearing area of the mine.