Synergic weeding composition

The invention belongs to the technical field of pesticide synergism and particularly relates to a synergic weeding composition containing 4-benzoyl pyrazole derivatives. The synergic weeding composition comprises effective weeding dosages of an active ingredient A and an active ingredient B, wherein the active ingredient A is a compound as shown in the specification; the active ingredient B is selected from one or more of the following compounds: 1) phenoxyalkanoic acids; 2) picolinic acids; 3) benzoic acids; 4) hydroxyl benzonitriles; 5) urea; 6) pyridines; 7) triazoinone; 8) diphenyl ethers; 9) acetamides; 10) aryloxy phenoxy-propionate; 11) cyclohexanedione; 12) sulfonylurea; 13) triazines; 14) sulfonamides; 15) phenyl-pyrazoline; and 16) other compounds, namely bentazone. The composition is capable of effectively preventing and removing broad leaved weeds, and has the characteristics of enlarging the herbicide controlling spectrum, being obvious in synergistic effect, reducing the application amount, being safe to crops and the like.