The utility model discloses a device for changing dead end insulator, including being used for changing wing section fixture that strain insulator string used and being used for changing the enclosedclamp that monolithic dead end insulator used, the wing section fixture include holds the wire end card of capable link plate erection joint level with both hands with the cross arm end card that is led the guiding plate erection joint by the strain insulator string cross arm changed end and with the strain insulator string wire of being changed, and cross arm end card is two wing structure with wire end card, and passes through the telescopic machanism connection between the corresponding wing of cross arm end card and wire end card respectively. The utility model discloses the collection ischanged strain insulator string, monolithic dead end insulator, the first piece dead end insulator of cross arm end and the first piece dead end insulator of wire end and is the kit, and not only operation safety has alleviateed operator's working strength, and the instrument transportation of being convenient for is moreover preserved.