The invention relates to a forming method for a retracting channel of a fully mechanized coal mining face device with large dip angle and large mining height and belongs to the technical field of coal mining. According to the invention, a working face is just bias arranged, a coal cutter can cut coal downward and upward on the basis of the channel height control, a hydraulic support serves as a temporary support and the hydraulic support, together with an anchor rope, an anchor rod and a rooting steel wire rope is used for jointly supporting a top plate, supporting in groups and mining the channel in groups, so that the forming method for the retracting channel of the fully mechanized coal mining device has the advantages of saving time and material, reducing labor intensity, increasing work efficiency, quickly and safely forming the channel and supplying a condition for the quick retracting of the fully mechanized coal mining face with large dip angle and large mining height. The forming method provided by the invention is convenient, safe, quick, stable and reliable.