The invention discloses a special assembling and disassembling tool for a pressure sensor. The special assembling and disassembling tool for the pressure sensor is characterized in that the assemblingand disassembling tool adopts a cylindrical structure; the internal part of the assembling and disassembling tool adopts a hollow structure which wraps the pressure sensor; the top end of the assembling and disassembling tool is a mounting column of a hexahedral mechanism, and a torque wrench is connected with the mounting column during assembling and disassembling; a C-shaped port is formed at the bottom of the assembling and disassembling tool; and the C-shaped port is matched with the wrench fixing position of the pressure sensor. By adoption of the above structure, the special assemblingand disassembling tool for the pressure sensor has three functions of convenience in assembling and disassembling, combination into a complete set as well as simplicity and practicability. The specialassembling and disassembling tool for the pressure sensor can provide convenience for mounting adjustment, failure rush repairing and daily maintenance of the pressure sensor of an electric locomotive.