The utility model discloses a bearing detaching tool. The bearing detaching tool comprises an installation plate (1) and a pulling plate (2), wherein the installation plate (1) is connected with the pulling plate (2) through a connecting post (3); a jack (4) is fixed on the installation plate (1), and is positioned between the installation plate (1) and the pulling plate (2); and the pulling plate (2) is provided with a groove (2a) for jacking the jack (4). Compared with the conventional triangular puller, the bearing detaching tool has the advantages that: forced applied by using the pulling plate is directly applied to the inner ring of the bearing, so that detachment of a bearing can be realized by using relatively small force; and moreover, the bearing detaching tool is used together with the jack, so that the labor intensity on bearing detachment is lowered. Moreover, compared with a heating detachment method, the bearing detaching tool has the advantages that: the bearing is not required to be heated, so that the influence on a bearing material is reduced, wear is reduced, and bearing failure is prevented.