Abstract: The antifeed activify ,toxicity and control effects of urinary wash mixture with different proportion of urea and washing powder on mustard aphid were studied in this paper.The results showed that the urinary wash mixture with the proportion of urea(4):washing powder(1):water(100)had the best effecys on mastard aphid.The antifeed rate in 24h,rectified mortality in 96h and population dropping rate in 7d of mrtand aphid were 75.08%,86.7% and 55% respectively.