Multiple scattering effect about Ship wake bubble is important for optical wake detection.Aiming at the effect of multiple bubble scattering on backscattering light intensity and degree of polarization,the polarization state of the photon was tracked by Euler vector method.Under the incident conditions of linearly polarized light and circularly polarized light,the characteristics difference was analyzed,which the different echo signals produce in the backward scattering light intensity and the degree of polarization,and the feasibility that the Euler vector method is used to optical wake of detection field is verified.