The invention belongs to the field of disassembling and overhauling devices for equipment in transformer stations, and relates to a disassembling tool for GW17 type disconnecting switch with a 220V voltage grade, in particular to a device special for disassembling a disconnecting switch ejector rod clamping spring. The device special for disassembling the disconnecting switch ejector rod clamping spring comprises a base (11), a supporting column (1) is arranged at one end of the base (11), a clamping spring ejector rod seat stand (10) is arranged at the other end of the base (11), a pressure arm fixing sleeve (3) is arranged at the upper end of the supporting column (1), a connecting wrench (4) is arranged on one side of the pressure arm fixing sleeve, the connecting wrench is connected with a pressure arm (6) through a movable shaft (5), a pressure arm handle (9) is arranged at the front end of the pressure arm, a pair of snap ring connecting plates (7) are hung and connected on the pressure arm, and snap rings (8) are connected to the lower portions of the snap ring connecting plates (7). The device special for disassembling the disconnecting switch ejector rod clamping spring can fully solve the problem that the GW17 type disconnecting switch spring is inconvenient to disassemble and the like, overhauling personnel can be prevented from using brute force to cause decline of equipment precision or even damage equipment, the safe reliability of the working of the personnel can be improved, working intensity can be lowered, working time can be saved, and efficiency can be improved.