The utility model relates to a novel simple coupler buffer detacher comprising a press fitting head. A jack is arranged on the press fitting head, a movable push head is arranged at the front end of the jack, a partial pin hole used for being fixed to a coupler tail frame is arranged at the upper end of the movable push head, and the rear end of the jack is connected with a hydraulic pump. The novel simple coupler buffer detacher is simple and ingenious in deign, easy to operate and small in occupied space and is particularly suitable for detachment and overhauling operation of small depot car repair coupler buffer devices of industrial enterprise railway car overhaul workshops; during detachment, a coupler, a coupler carrier and a coupler tail support plate are detached firstly, and then a detachment head is fixed to the coupler tail frame via flat pin holes; the ultra-thin hydraulic jack is disposed on one side of the press-fitting head, the manual hydraulic pump is pressed, the jack butts against the movable push head to compress a buffer, and a coupler buffer device can fall down from a car body freely.