The invention discloses a repeatable hole digging gas extraction method for a down-hole high-stress soft coal seam. The method comprises steps as follows: rock drilling is constructed in a rock roadway drill site; a seamless steel pipe is pushed into a rock hole, the tail end of the seamless steel pipe is exposed out of the opening of the rock hole, and a flange cover plate provided with a high-pressure valve is mounted at the tail end of the seamless steel pipe; the seamless steel pipe is fixed; cement slurry is injected into the seamless steel pipe; after the cement slurry is solidified, extraction drilling is constructed in the seamless steel pipe; a pressure-tight test is performed on an extraction hole; the extraction drilling is constructed continuously until the hole penetrates through the coal seam to reach a rock stratum, and the high-pressure valve is connected with a drainage system for extraction; if the gas flow or the gas concentration is found to decrease obviously, the extraction hole is cleaned again until the extracted gas amount in the extraction range reaches the preset value. On the premise that hole sealing is guaranteed, the hole is dug repeatedly, the drainage concentration is increased, meanwhile, the ground stress of the area can be significantly reduced, and coal and gas outburst risks of the coal seam are reduced.