The well site survey high-resolution digital seismic detection technology, Cone Penetration Testing (CPT) technology and submarine sonar scanning technology are introduced, the advanced technologies are used to identify the pile insertion risk of jack-up drilling rig, and the safety measures are formulated. The technologies are of good guiding significance for offshore positioning operation. Taken the application in PL15-2 and BZ25-1 oilfields as the examples, the positioning problem of the drilling rig is solved, and the exploration plan is successfully implemented, which is of broad application prospect.