Abstract: Deep-hole presplitting explosion technology was applied to crossing large fall fault of fully mechanized coal mining face，then coal production would be improved and continuous production of working face would be ensured，but the technology promotion was restricted by some factors，which include worse environment underground，high standard of the technology and safety problems of working face.And then the technology processing was analyzed systematize under the anciently experience，processing law was put forward，and high drilling quality would be meted，powder charge，block off and explosion and so on were innovated，some disadvantages of old processing that explosive cartridge distribution uneven，worse block off and explosion shaking could not be controlled easily and so on ，and every process was assured safety and efficiency，the technology was applied in 2303S working face of Xinjulong coal mine under specific condition of fault，the results showed that deep-hole presplitting explosion processing could improved explosion results effectively，safety processing was ensured，coal cutter crossing fault successfully.