Abstract: This paper presents a new method in mining deeply inclined coal seam with medium thickness.A retreating longwall is divided into several sections which stagger each other in sequence.Each section is 25～30m long and orientated 6°～8°to dip·Wooden plates are installed in the longwall face to prevent the rolling rock from damaging the props and to top coal lumps roll down hill into the gob.Side packing is used to maintain the gate-entries. In view of stress concentration around the upper gate-entries.precautions including secondary support stress relier, and adjusting the length of the staggered sections （increase the length of the upper sections） have been taken to assure safety in personnel travelling and material delivery.