The development of offshore oil and gas resources in China mainly depends on offshore platforms. In recent years, the workover problem without workover rig platform is gradually exposed, which is restricted by workover tools, inefficient wells and long-term well shutdown. Based on the investigation of workover mode without workover rig platform in China"s offshore oil and gas fields, this paper summarizes the mature workover rig relocation technology, hydraulic workover rig technology, coiled tubing workover technology and bailing electric pump technology, demonstrates the applicable conditions of various technologies, and analyzes the technical limitations. According to the development situation of offshore oilfields in China, the bottleneck of workover without drilling platform is to improve operation efficiency and reduce operation cost. There will be great progress in drilling and workover technology in the future. Through the thinking and Prospect of workover technology without drilling and workover machine platform, the ideas of workover with offshore platform without drilling and workover machine are sorted out, which provides a reference for the development of offshore platform and workover with offshore platform without drilling and workover machine.