The invention provides a switch for restraining VFTO. The switch comprises a switch body, running equipment and a power supply, wherein the switch body comprises an isolating switch, a mechanical switch, timing switches and an energy storage element; a positive pole of the power supply is connected with one end of the isolating switch, the other end of the isolating switch is connected with one end of the running equipment, and the other end of the running equipment is connected with a negative pole of the power supply; the mechanical switch is further arranged at the other end of the isolating switch through linkage, on-off states of the isolating switch and the mechanical switch are reverse, the mechanical switch is connected with the energy storage element in series, and the energy storage element is connected to the negative pole of the power supply; the timing switches are connected to the two ends of the mechanical switch in parallel. According to the switch for restraining VFTO,the energy storage element is controlled through the timing switches to restrain VFTO generated by the isolating switch by some time, damage of VFTO is reduced for the running equipment, the restraining time for VFTO can be controlled by adjusting the timing switches, in this way, extra power loss is reduced, and restraining reliability is improved.