The invention relates to a paddy field herbicidal composition based on non-transgenic imidazolinone herbicide-resistant rice varieties, comprising active ingredients a, b and c; wherein a is selected from imazethapyr, imazamox, imazethapyr, imazamox A kind of in acid, imidazolinic acid, imazapyr, imazamox, imazamox methyl, b and c are respectively selected from aryloxyphenoxypropionic acids, sulfonylureas, sulfonamides, triazoles Pyrimidine sulfonamides, amides, pyrimidinesalicylic acids, pyridyloxyacetic acids, arylpicolinates, quinoline carboxylic acids, phenoxyacetic acids, triketones, pyrazolopyridine rings, oxadi One of azole nitrogen-containing heterocycles, fluorophenyl ethers, triazolinones, organic heterocycles, dithiophosphoric acid esters, and benzonitrile, the categories of b and c can be the same but the specific compounds are different, The combination of a, b and c in a certain proportion has a synergistic effect on the target weeds, and is suitable for preventing annual weeds in paddy fields of non-transgenic rice varieties resistant to imidazolinone herbicides.