Abstract: In order to ensure the speed of coal seam exposure and improve the efficiency of stripping operation, the single bucket truck technology of throwing blasting was used during the maintenance of the dragline in Heidaigou open pit coal mine. Based on the analysis of the technological process and technical characteristics of the single bucket truck technology of stripping loose blasting, the single bucket truck technology of throwing blasting and the pull bucket shovel technology of throwing blasting, this paper compares the advantages, disadvantages and applicable conditions of the three stripping technologies, and takes the actual project of Heidaigou open pit coal mine as an example, studies and proves that the single bucket truck technology of throwing blasting can improve the stripping efficiency Ensure the coal seam exposure speed, shorten the truck distance, reduce investment and other advantages. The technology is worth popularizing in the open pit with suitable conditions and has a bright future.