The utility model discloses a supplementary device of installing and removing of high pressure substation equipment ground connection, including being used for placing being affiliated to the mechanism, being used for driving the elevating system and the control mechanism that are affiliated to the mechanism and rise or descend of earthed pole, be affiliated to the mechanism including being used for placing the base of earthed pole and the setting is used for supporting the solid ground pole on the base fixed cover, the camera is installed at fixed cover top, elevating system includes the lift post and is used for controlling the elevator motor that the lift post rises or descends, the top of lift post is fixed with work platform, it sets up on work platform to be affiliated to the slidable of mechanism, control mechanism is connected with camera, elevator motor electricity. The utility model discloses not only can improve the efficiency that high -pressure substation equipment installed and removed the earth connection, promote fortune and examine work efficiency, use safe and reliable moreover, can ensure staff's personal safety.