According to the status of the sound environmental quality on the both sides of Chencun steam in Zhujing Delta, the sound environmental impact in the areas from 0 to 200 meters of the dredging project of Chencun stream was predicted and assessed by the prediction model. During the building period, the equivalent sound level is basically conform to the national standard, and the environmental quality would not be impacted. During operation period, the environmental quality could be impacted in certain extent. The maximum noise impact is in Linyue village while the minimum noise impact is in Yaogu farm. The maximum day equivalent sound level is 66.3 dB(A), the minimum day equivalent sound level is 63.5 dB(A). The maximum night equivalent sound level is 58.8 dB(A), the minimum night equivalent sound level is 54 dB(A). The percentage of exceeding the national standard are 5.8%-10.2% in daytime, 8%-17.6% at night.