Abstract: In view of the characteristics of the steeply inclined large-thick iron ore body such as large changing morphology，many rock interlayer，and through the innovation on traditional upward high layer continuous cut and fill mining method，the upward high layer continuous cut and fill mining method with a main transport roadway and 225 m sublevel and 75 m slice in height without any auxiliary section is proposedMeanwhile，the techniques like pillars setting in stope，roof horizontal smooth blasting，and full-tailings backfill，are utilized to effectively reduce the dilution rate，decrease the safety issues in drilling at the empty field and ore drawing，and lower the backfilling costsThe practice has proved that this method above can effectively reduce the amount of mining preparation，improve mining efficiency，and reduce production costs.

Key words: Steeply inclined large-thick iron ore body, Continuous filling, Upward high layer, Mining method