The present invention relates to an electronic control fuel saving clutch device for a vehicle, comprising: an electronic control clutch (7), a brake switch (8), an accelerator sensor (9) and an electromagnetic fuel line throttle valve (G) for opening and closing the accelerated fuel supply; the electronic control clutch and the electromagnetic fuel line throttle valve are controlled by the brake switch and signals emitted by the accelerator sensor, wherein when the brake switch is switched on, the electronic clutch is engaged, and the electromagnetic fuel line throttle valve is closed, and the engine is supplied only with the idle fuel supply; when the brake switch is switched off, if the accelerator sensor detects that the accelerator pedal (P) goes forward or keeps in a certain forward position, the electronic control clutch is engaged and the electromagnetic fuel line throttle valve is open, then the accelerating fuel supply is switched on, and the engine is supplied with the accelerating fuel supply; if the accelerator sensor detects that the accelerator pedal comes back or keeps in a certain back position, the electronic control clutch is disengaged, and the electromagnetic fuel line throttle valve is closed, then the accelerating fuel supply of the engine is cut off, and the engine is supplied only with the idle fuel supply.