Abstract: Tomography is a common means of modern seismic exploration and development process, according to the traditional view of traveltime tomography inversion with the coverage problem, using the regularization constraint to solve the judgment accuracy, judging the experimental model by using pick fitting angle gather, at the same time, no longer use the original shot records to pick up the residual move out, improving the accuracy of picking travel time residuals by using linear of depth the residuals and travel time residuals. With three layers in the model and real data inversion results show that: the method can update the migration velocity field better, get the migration results more accurate, and describe the construction of small scale geologic.