The utility model provides a technical scheme of an emergency shutdown system of a gas cut-off valve. The emergency shutdown system adopts a combination structure of an uninterruptible power supply, a soft starter and a relay control element and the purpose of the driving of the inductive loads by the uninterruptible power supply is achieved. The device has the characteristics of simple structure, convenience in maintenance, accuracy and reliability. When a failure of widespread blackout occurs in the power supply system of a hot blast stove, the device can fast shut down the gas cut-off valve and cut off the gas input into the hot blast stove to prevent gas leakage and hot blast stove from exploding to achieve the protection of devices and personnel.