Uniformly ring-labeled ^(14)C-propachlor was incubated aerobically in soil suspension at 27℃ for 20 days. After centrifugation, the radioactivities of the chloroform and aqueous layer of the suspernatant I extraction were 21.3% and 50.4%, respectively. The radioactivity adsorbed on soil was 20%, 5.6% of which was methanol-extractable and 14.4% remained in soil. The maetabolites identified from the chloroform extract by GLC-MS include N-isopropylaniline, N-isopropylacetanilide, N-(1-hydroxy-isopropyl) acetanilide, and N-isopropyl-2-acetoxyacetanilide. The possible pathways were proposed for the formation of the metablolites.