The present invention relates to synergistic herbicidal composition comprising Tefuryltrione and at least one co-herbicide selected from Dichlorophenoxyacetic acid (2,4-D), Anilofos, Azimsulfuron, Bentazon, Bispyribac, Ethoxysulfuron, Pendimethalin, Pyraclonil, Pyrazosulfuron and their agrochemically acceptable salts thereof which are standard in agriculture or mixture thereof.