As a seismic imaging technology, pre-stack depth migration could effectively solve the influence of anisotropy of underground media and improve the accuracy of seismic imaging in complex structural areas，among which the reliability of velocity model significantly affected the effect of pre-stack depth migration. In this paper, pre-stack depth migration technology was used in shallow seismic work area, and the joint velocity modeling of refraction wave and reflection wave was used to improve the accuracy of shallow seismic imaging. Through the comparison of single velocity modeling and joint velocity modeling section, the imaging accuracy of joint velocity modeling in shallow layer was higher, and the results showed that joint velocity modeling was better in shallow seismic imaging.