Abstract: Yuanba Gasfield is the first ultra-deep high-sulfur reef gas field in China. The high yield is accompanied by a large amount of water, the corrosion problems along with reservoir development have increased obviously. For this reason, the corrosion problems and corresponding protective measures of the water gathering system in Yuanba Gasfield are introduced. According to the classification of corrosion damage, the corrosion of the water gathering system in Yuanba Gasfield is local corrosion. The sulfur-resistant carbon steel cannot be used alone in the water gathering system in high-sulfur gas field, but when the sulfur-resistant carbon steel was added with corrosion inhibitor, its service life may be prolonged. The corrosion problems are noted due to increased media non-uniformity during pipelines outages. In addition, in the development and production process of high-sulfur gas fields, traditional online corrosion monitoring technology can not discover local corrosion such as pitting corrosion in time, therefore non-destructive testing methods like radiation detection and ultrasonic thickness measurement are introduced to complement fixed-point detection.