The invention discloses a vacuum remote maintenance mechanism used under a strong radiation environment. The vacuum remote maintenance mechanism comprises a base, a parallel speed reducer, a linear slide rail, a slide block, a flange supporting plate, supporting rods, positive and negative buckled lead screws, hoop type quick release chains, a chain limiting structure, a corrugated pipe supporting assembly, a drive gear, a rack and a brake fixed block. On the premise of guaranteeing that vacuum maintenance is smoothly completed, number of operators can be reduced as many as possible, maintenance time of the operators can be shortened as much as possible, and radiation dose on the operators is reduced.