YT27 Type rock drill is a kind of high efficiency air leg rock drill machine. It's mainly used for blasting holes and other drilling works, such as in quarries, railway construction, water conservancy construction and national defense project facility. It's matched with FT160A or FT160B air leg and FY250 oil feeder as usual, which is suitable for the wet drilling under various rocks at clinic and incline orientations, also can be used in the trolley without air leg to be feed.