The utility model relates to an adjustable bearing housing detacher, which is provided with a beam with a rectangular cross section. Internal threaded holes are arranged between the upper face and the lower face in the middle of the beam, screws are screwed into the internal threaded holes, strip-shaped holes are symmetrically arranged respectively between the upper faces and the lower faces at both sides of the beam, a pull rod penetrates through the strip-shaped hole, the lower end of the pull rod is provided with a pull head, the upper section of the pull rod is a threaded rod section, upper and lower nuts on the upper face and the lower face of the beam are screwed on a threaded rod, the outer diameter of the nut is larger than the width of the strip-shaped hole, the pull head is provided with opposite screw holes, one of the opposite screw holes is a left-hand threaded hole, and the other is a right-hand threaded hole. A puller threaded rod is connected between the two opposite screw holes, the middle section of the puller screw rod is provided with a wrench square, and both sides of the puller threaded rod are respectively provided with left-handed external threads and right-handed external threads. The adjustable bearing housing detacher detaches the bearing housing embedded in a bearing cup by the rotation power of the threads and the pull head matched with the inner circumference surface of the bearing bushing, has high working efficiency and low cost, and does not cause damage to electromechanical equipment.