Mixed herbicide containing imazapic and fluazifop-butyl

The invention discloses mixed herbicide containing imazapic and fluazifop-butyl. The imazapic and fluazifop-butyl serve as main effective components, wherein the mass ratio of the imazapic to fluazifop-butyl is 0.1-80:0.1-80. During application to post-seedling weeding in a peanut field, the mixed herbicide has the advantages of being broad in spectrum, efficient, low in toxin, safe and environmentally, being quick in action and the like.