The invention relates to a herbicidal composition containing penoxsulam. The herbicidal composition is prepared from the active ingredients of penoxsulam, benzobicylon and butachlor in a mass ratio of(1 to 50) to (1 to 50) to (1 to 50), the total mass of the three active ingredients accounts for 1% to 80% of the mass of the herbicidal composition, and the rest are auxiliary ingredients. The herbicide composition can be prepared in a pesticide formulation of emulsifiable concentrate, suspending agent, wettable powder, water-dispersible granules, aqueous emulsion, microemulsion, granules, and dispersible oil suspension, and can be mainly used for the prevention and control of broadleaf weeds and grass weeds in rice fields.