Linkage grounding safety device after switching pole-mounted switch off

The invention discloses a linkage grounding safety device after switching a pole-mounted switch off. The technical solution is characterized in that two ends of the housing are respectively provided with a pole-mounted switch bracket and an isolating switch bracket at the upper side; the pole-mounted switch and an isolating switch are respectively fixed on the pole-mounted switch bracket and the isolating switch bracket transversely; the pole-mounted switch is arranged at the power supply side of the housing; the isolating switch is arranged at the load side of the housing; the pole-mounted switch bracket and the isolating switch bracket are respectively provided with a rotating shaft which is movably arranged in the longitudinal direction; the pole-mounted switch and the isolating switch are connected with the rotating shafts through an isolating pull bar; the upper end of each isolating pull bar is movably arranged on the pole-mounted switch or the isolating switch correspondingly, and the lower end is fixedly arranged on the rotating shaft fixedly; an interlocking bar is hinged between the two rotating shafts so that one switch in the pole-mounted switch and the isolating switch is on and the other is off; and three static contacts of the isolating switch are connected together through a shorting strip. The linkage grounding safety device can be widely applied in the field of electric power mending tools.