The utility model relates to the technical field of valves, and discloses an emergency
cut-off valve with a non-
return function, which comprises an electric valve, a first
pipe connecting port and a second
pipe connecting port are respectively integrally formed on two sides of the electric valve, an electric
actuator is mounted at the top of the electric valve, a
handle is mounted on the electric
actuator, and a valve clack is connected to the bottom of the electric
actuator. The valve clack is controlled by the electric actuator, the valve clack is arranged in the electric valve, an automatic module is installed on one side of the top of the electric actuator, a
temperature sensing switch is installed in the automatic module, the
temperature sensing switch is electrically connected with the electric actuator, the electric actuator is controlled by the
temperature sensing switch, and a check plate is rotationally connected into the electric valve. According to the emergency
cut-off valve with the non-
return function, by arranging the temperature sensing switch and the
toxic gas sensing switch, the
cut-off valve can be automatically controlled, the emergency cut-off valve adapts to different operation scenes, and safety is ensured; and the
signal transmission module is arranged to receive a
remote control signal, so that
remote control of the emergency cut-off valve is realized, and the operation convenience is improved.