High-voltage intelligent drop-out fusing device and safe switching-on and switching-off method

The invention relates to the technical field of drop-out circuit breakers, in particular to a high-voltage intelligent drop-out fusing device and a safety opening and closing method, the high-voltage intelligent drop-out fusing device comprises a drop-out fuse, a controller, a permanent magnetic mechanism and a current and voltage monitor, and the controller is electrically connected with the permanent magnetic mechanism and the current and voltage monitor; the shielding device comprises a current transformer II arranged on the fusion tube in a sleeving mode and an electromagnet electrically connected with the current transformer II, the movable end of the electromagnet is connected with a movable sinker bar, the end of the movable sinker bar is vertically connected with a push plate, the device further comprises a sealing cover capable of sealing the two sides of the manual pull ring, and the sealing cover comprises two sealing cover units eccentrically and rotationally installed on the two sides of the elec