The invention relates to a weeding composition containing halosulfuron-methyl and quinclorac as well as fluroxypyr. The effective components of the weeding composition are halosulfuron-methyl and quinclorac as well as fluroxypyr, and the weight part ratio of halosulfuron-methyl, quinclorac and fluroxypyr is (1-10):(1-50):(1-20). The weeding composition has a synergistic effect, can be used for preventing and removing grassy weeds, broadleaf weeds and cyperaceous weeds in wheat fields, corn fields, paddy fields, sugarcane fields and sorghum fields, is remarkably superior to a individual weedicide separately used or a combination of two weedicides in effect, expands a weeding spectrum, reduces the pesticide consumption, alleviates the environmental pollution and delays the pesticide resistance of the weeds.