Abstract: The safety support and rapid retracement of retracement channel at fully mechanized working face is the key to realize mine safety and efficient production, is also the main technical problems should be solved for mine technical personnel. This paper introduces the development process of channel support and retracement technique simply. Taking channel support and pressure relief and cut-through project in Halagou Coal Mine 12201 fully mechanized working face as an example, the paper introduces the research application of anchor cable support for channel constant resistance large deformation + pre-splitting blasting roof cutting and pressure relief new technology in detail, and summarizes the effect of application process.