The invention particularly relates to a bearing disassembling tool. The tool comprises a slider base which comprises a front end clamping part and a rear end slider installing part; the front end clamping part is composed of two clamping blocks which are parallel to each other, and a distance D is formed between the two clamping blocks; the two clamping blocks are each in a stair shape, and therefore a slide way matched with the shape and the size of inner ring sliders is formed; D is matched with the diameter of a rotating shaft provided with a to-be-disassembled bearing; the rear end sliderinstalling part is arranged at the tail end of the slide way, and is a concave hole used for containing the two inner ring sliders; and each inner ring slider comprises a base body which is provided with a semicircular notch, and each base body is provided with a semicircular protrusion in the direction of the corresponding semicircular notch. The bearing disassembling tool is applicable to nondestructive disassembling operation of various ball type and sliding type bearings, a bearing inner ring is supported by using the disassembling tool, meanwhile, pressure is applied to the shaft, the shaft is made to be separated from the bearing, only the bearing inner ring bears force in the whole process, it is guaranteed that other portions of the bearing do not bear force, and therefore the nondestructive disassembling operation of the bearing is achieved.