The utility model provides a disassembling tool. The disassembling tool comprises a tool body, a pushing body, a disassembling barrel, a fixed rod and a snap ring. One end of the pushing body is a power input end, and the other end of the pushing body is connected with the disassembling barrel. The disassembling barrel is used for pushing the snap ring which is arranged on a groove of a drive shaft groove. The fixed rod is used for fixing the drive shaft on the tool body. The utility model provides a disassembling tool for a bearing which slides with a drilling tool. The disassembling tool is capable of rapidly and conveniently disassembling a male bearing from the upper portion of the drive shaft under the condition of ensuring that the bearing is not damaged. The disassembling tool utilizes the characters that the acting force of a hydraulic system is big and stable, the two tools are evenly arranged through interference fit along the direction of the two tools and the tools do not be damaged.