The present invention relates to a herbicide mixture having a synergistic action, and more particularly, to a synergistic herbicide mixture including: diquat dibromide and nonselective herbicide a herbicide composition including the herbicide mixture as an active ingredient and a weed control method using same. The herbicide mixture of the present invention is characterized in that diquat dibromide and glufosinate ammonium are mixed at a certain ratio, thereby showing 80% or more of a herbicidal effect on various weeds and plants, and a herbicidal activity lasting at least 30 days, as well as a rapid herbicidal activity of 6 to 23 hours (within one day), on average, on a road surface on which an average actual light irradiation is actively performed. Thus, the herbicide mixture has an advantage in that a synergistic effect is obtained during use (which cannot be expected to compare the case of a single drug in which diquat dibromide and glufosinate ammonium are separately used). In particular, due to a difference in the action mechanisms of diquat dibromide and glufosinate ammonium, diquat dibromide, at the same time, allows for drug efficacy following treatment to be promptly exhibited, and glufosinate ammonium allows for weeds in shaded areas without sunshine to be removed. Further, since the combined drug has a duration of efficacy of at least 30 days, as well as a fast-acting property exhibited within a day after treatment, after one control application, there is no need to use a herbicide for a long period of time. Thus, the combined drug is effective in reducing the amount of agricultural chemicals that would otherwise be used.La présente invention concerne un mélange herbicide ayant une action synergique, et plus particulièrement, un mélange herbicide synergique comprenant : du dibromure de diquat et un herbicide non sélectif une composition herbicide comprenant le mélange herbicide utilisé comme principe actif et un procédé de lutte contre les mauvaises he
