Abstract: In order to improve the problem that the slope of Jianshan Phosphate Mine cannot achieve ideal effect due to the complicated natural fractures and geological stratification in slope cutting and unloading blasting,according to the stratification characteristics of phosphate rock slope,combining the advantages of presplit blasting and smooth blasting,the natural crack between rock strata is used as prefracture to carry out controlled blasting of slope,and the vibration reduction blasting technology near the slope is put forward.Two rows of buffer holes and one row of main blasting holes are arranged near the permanent slope near the mining platform.Taking the natural cracks are as precracks,the buffer holes are charged in sections according to 1/3 proportion,and 1.5 m inert filling is filled in the middle; the main blasting hole adopts continuous charging and hole by hole initiation technique.Since more than half a year of implementation,the slope surface after cutting is smooth and level,and the safety of the slope is ensured.Compared with the conventional presplitting blasting,the cost of nearly 2 million yuan perforation blasting and the cost of later crushing is saved.It not only speeds up the slope cutting unloading speed,but also reduces the disturbance to the slope and delays the change rate of the slope,which effectively guarantees the continuous mining and rock shoveling under the slope in the eastern mining area,and can provide reference for similar engineering construction.