The invention discloses a permanent magnet power-assisted double-ended vacuum insulation earthing switch. The permanent magnet power-assisted double-ended vacuum insulation earthing switch comprises apositioning mounting plate, a mounting support, an auxiliary contact assembly, a synchronous connecting plate, an insulating pull rod, a substrate plate, a contact spring, a soft connecting line, a vacuum switch tube, a linear bearing, a rack shaft, an insulating pole, a double-thread screw, a screwed plug, a connecting rod, a gear shaft and a permanent magnet chuck, wherein the rack shaft and the gear shaft are mounted on the substrate plate through the mounting support, the positioning mounting plate and the linear bearing; the permanent magnet chuck and the auxiliary contact assembly are arranged between the substrate plate and the synchronous connecting plate; the end of the insulating pole is fixed on the substrate while the vacuum switch tube is mounted inside the insulating pole; and a vacuum degree monitoring sensor is preinstalled at the static end of the vacuum switch tube. The vacuum insulation type technology is reliable, a high-voltage fracture is closed, the journey is compact, the structure is flexible and convenient in overall arrangement, the mechanism is smart, simple and labor-saving, and the mechanical property matched thinking is novel.