The invention provides a layered separated mining technology with an extremely-thick coal seam continuous miner and filling combined, and belongs to the technical field of coal mining. The problem that conventional fully mechanized top coal caving or large mining height fully-mechanized coal mining faces can not be arranged on boundary coal of extremely-thick coal seams is solved. An extremely-thick coal seam coal seam with the thickness being 8-13 m is divided into an upper separated layer and a lower separated layer, 3-5.5 m of mining is conducted on the upper separated layer, 3-5.5 m of mining is conducted on the lower separated layer, the thickness of a middle layer is 1-2 m, and coal resources are stoped in a layered mining mode. lower separated layer is mined at first in the way thata continuous miner is adopted to arrange lower separated layer branch roadway mining caverns in a single wing of one side of a lower separated layer branch roadway, which is cooperatively combined with a paste filling mode, and the mode of first jump mining and then filling is adopted; then the upper separated layer is mined, the upper separated layer is mined in a wangeviry mode, upper separatedlayer branch roadway mining caverns are arranged on a single wing of one side of an upper separated layer branch roadway for mining, and stoping is conducted sequentially in a retreating mode. The layered separated mining technology with the extremely-thick coal seam continuous miner and filling combined is reasonable in process, high in mechanization degree and high in working face recovery rate, thereby being a very reliable extremely-thick coal seam coal seam boundary coal mining method.