The invention belongs to the fields of seismic exploration and development, in particular to a speed analysis method aiming at cross-hole earthquake and near-surface. Aiming at the problems of great near-surface transversal speed change, and the like of regions with complicated geological conditions, the invention utilizes the first arrival travel time of the ground seismic data to establish a near-surface speed model through an SIRT (Simultaneous Iterative Reconstruction) tomography technology based on a shortest path to provide speed data for subsequent seismic data treatment so that the developed chromatographic images have practicability.