The negative effects of agrochemicals on ecological environment were briefly introduced,and the quantity of agrochemicals used in Liaoning Province in the recent years also were analyzed in this studied.Research results showed that the amount of chemical fertilizer used per hectare of all cities in Liaoning Province were higher than national average level,and exceeded security upper limit which constituted by developed countries.The quantity of pesticide used in four cities was aslo higher than national average level.Amount of plastic for farm use in Liaoning Province is large and place in a competition before the forth in the range of whole country.