Abstract: In the article, the research and design of abrasive jet flow down hole slotting forming fissure tools hasbeen analysed. Down hole submerged jet flow fracture making technology is a kind of technology which mix certain proportion solid particle (quartz sand) as abrasive in water jetflow to drive pipe and the rock. For the convenient fieldwork, the down hole forming fissure plugging tools can go into the well with more nozzles, which has realized replacingnozzles for immobile string. Through the ground and thefield actual experiment, the abrasive jet flow down holeforming fissure plugging tools realized to make more fractures in one pipe and satisfied the requirement of oil layersegmentation transformation.