Abstract：Ray traeing method of seismic wave has wide applieation in seismic data processing and its precision and computational efficiency directly determine the quality of data processing. Therefore,constantly improving the ray-tracing method has always been the human's studied hot spot. Generally, the pcople considered that shooting method is rapid and accurate method for solving ray-tracing problem between two points. On that basis , using area coordinate of triangle, the paper presented several shooting ray-tracing methods:simplicity method,triangle sub division method , triangle partition method and sub triangle method. The studied results showed that the sub triangle method is characteristics of fower shooting numbers, rapid convergence and high precision. The 3-D ray-tracing theoretical studies and real cases presented by the paper showed that using correction of directional components of shooting has better results by comparison with direct correction of shooting angles when shooting correction is carried out.
