Abstract: Ocean bottom node (OBN) acquisition is an important method in marine seismic exploration for obtaining high-quality data. Node relocation is a crucial quality control step in this process, as its accuracy directly affects imaging quality. Therefore, it is necessary to perform node relocation using OBN data to precisely determine actual node positions. To meet the requirements for high-efficiency high-precision positioning in mass OBN data acquisition, this paper analyzes two methods: least squares-based circle-circle intersection and grid scanning, using field data from WX area. We investigate their principles, accuracy, and efficiency, and implement a quantitative quality control evaluation of their results. Test results indicate a clear advantage in positioning accuracy for the grid scanning method over the circle-circle intersection method; the former achieves errors of less than 2.5 m, meeting operational requirement. The study identifies data type, circular radius, and the spatial uniformity of shot points as the main accuracy determinants for the grid scanning method. The case study of WX area suggests that a radius of 300 m is suitable for node relocation, and more even and symmetrical shot point distribution within the circular area leads to higher positioning accuracy. This study provides a solid foundation for high-quality data acquisition and imaging in Sinopec's marine OBN seismic exploration.