Abstract: Coiled tubing（ CT） technology is becoming mature in various downhole operations currently. However, domesticapplications of CT limits in relatively simple downhole operations, and its advantages have not fully exerted. So on the basis ofcomprehensive analysis of CT techniques development, this paper makes an overall summary on CT techniques development in foreigndownhole operations. And then it makes a comparison study of domestic use and technical services. Finally, the authors propose variousunfavorable factors of domestic CT technology development, current opportunities and strategies for successful coiled tubing operations.This research is beneficial to improve domestic downhole applications level, promote the development of related CT technology.