The invention discloses an efficient herbicide, made from, by weight, 6-10 parts of sodium polyacrylate, 10-12 parts of chlorimuron-methyl, 6-8 parts of tribenuron-methyl, 6-8 parts of bensulfuron methyl, 40-50 parts of fluoroglycofen-ethyl, 8-12 parts of fluroxypyr, 15-25 parts of chipton, 15-25 parts of mint, 20-30 parts of bensulfuron methyl, 20-30 parts of methyl isopropyl ketone, 6-10 parts of cyhalofop-butyl, 5-7 parts of mefenacet, 20-30 parts of sodium nitrate, 10-12 parts of citric acid, 8-10 parts of sodium hexametaphosphate, and 40-60 parts of water; the efficient herbicide is high in activity, has long acting time and can well inhibit the growth of rice weeds.