The utility model provides a decoupling zero burner, decoupling zero burner includes preceding wall, mid -board, back hot wall, induced air device and second grate, the mid -board lies in between qianqiang and the back hot wall, preceding from the top down has on the wall set gradually charge door, first vent and second vent, induced air device and first vent intercommunication, the second gratesets up in the front the lower part in space between wall and the mid -board, highly is located between first vent and the second vent, form the burner between mid -board lower part and the second grate, the pyrolysis gas ization district is the upper portion space in space between preceding wall and the mid -board, the semicoke district is the space of the top of pyrolysis gas hua qu lower part,second grate. The multiplicable decoupling zero of decoupling zero burner burning semicoke district scope to making semicoke district and pyrolysis gas ization district ventilate and changeeing balanced control, the reinforcing is to the adaptability of fuel property and burner capacity, reaction rate that optimal control pyrolysis gas ization district and semicoke were distinguished.