The invention discloses an electric power safety grounding apparatus, and mainly relates to the technical field of electric power safety facility. The electric power safety grounding apparatus comprises a shell; a rotary shaft is arranged in the shell; a winding drum is arranged on the rotary shaft; a grounding wire is arranged on the winding drum; a conductive clamp is arranged at one end, far from the winding drum, of the grounding wire; the conductive clamp is provided with an insulating rod; a jack, matched with the insulating rod, is formed in the shell; a fixed clamping plate and a movable clamping plate are arranged at the bottom of the shell; a nut is arranged on the movable clamping plate; a lead screw matched with the nut is arranged in the shell; a spline shaft is arranged at one end of the lead screw; a locking tray is arranged on the spline shaft; and a locking pin matched with the locking tray is arranged in the shell. The electric power safety grounding apparatus has the beneficial effects as follows: the electric power safety grounding apparatus only can be connected with a pre-embedded grounding apparatus firstly in use, and then is connected with to-be-maintained facility; in detachment, only the conductive clamp can be detached firstly, and then the grounding end is detached; otherwise, the electric power safety grounding apparatus cannot be used; and therefore, standardization of the grounding apparatus can be realized, and occurrence of safety accidents can be avoided.