In order to study the detonation wave propagation characteristics of composite charge under eccentric initiation, the detonation wave was measured by the orthogonal multi-slit scanning technology.By analyzing geometric relation of multi-slits scanning traces from two mutually perpendicular directions, the detonation wave propagation velocity and direction at the intersection of multi-slits were obtained.Moreover, combined with the propagation process map of directional convergent detonation wave, the propagation characteristic of detonation wave was investigated.Results show that because of the difference between inner and outer charging detonation velocity, the detonation wave propagation is in an arc shape in the process of convergence inside, then forms a horn shaped wave, and the detonation velocity along the centerline increases by about 1.67 mm·μs^-1.