Abstract: The degradation and absorption behavior of phenthoate in soil and water were investigated in laboratory stimulation conditions.The results showed that the degradation rate of phenthoate in soil increased with the increasing of temperature and water content of soil.The presence of microbes enhanced the degradation of phenthoate.When soil temperature was at 20 ℃,the degradation half-lives of phenthoate were 10.66,11.65 and 6.53 days in water of pH 5,7 and 9,respectively.The absorption of phenthoate in three kinds of soils conformed to Freundich equation,and the absorption became stronger with the increasing level of soil organic carbon.