Abstract: Drilling noise has a bad impact on health and life of staff. Through field testing and analyzing drilling equipment noise in 21 drilling well site in Shengli Oilfield, it is found that noise source in the well site distributes scatteredly. The value of drilling noise constantly ranges from 73.2 dB to 109.4 dB, the largest noise of engine room can achieve 109.4 dB, the maximum noise value of drilling pumping room is 97.3 dB, and the noise at drilling floor can reach 93.4 dB. The rig with 3 200 m drilling depth can produce the highest noise, which exceeds 90 dB, and the noise will decrease with the increase of depth, then tend to stabilize at last. For the purpose of reducing noise, well site layout can be arranged reasonably, electrical power drilling technique and install insulation board around the main equipment and well site can be taken use of preferably.