Because of the high ground stress of underground powerhouse in Jinping first stage hydropower station, the local rock crushing, layered split damage and surrounding rock depth deepening & displacement enlarging occurred with the release of stress and redistribution. In order to realize anchorage support effect as soon as possible to ensure bracing surrounding rock stability and engineering safety, the original design of in-situ concrete anchor pier was adjusted to be steel anchor pier with good quality and progress. The paper describes the steel anchor pier construction process, quality control points and the comparative analysis on ergonomics with concrete anchor pier.