In order to reduce the wave path difference, a Cross-eye jamming structure is proposed based on forwarding path optimization. An interference signal propagation path model is established by analyzing Cross-eye signal propagation path. Under condition of radar arrival direction deviating the perpendicular bisector of Cross-eye jamming antenna, through changing the location of double loops crossing receiving antenna and transmitting antenna, the phase changes caused by wave path-difference when interference distance is far away could be reduced and Cross-eye interference effect could be improved. The following conclusions are demonstrated by the simulation results: the farther the distance between Cross-eye jamming structure and radar is, the smaller the wave path difference is; the bigger the angle of radar incoming wave direction measured from the perpendicular direction of the Cross-eye jamming structure is, the smaller the wave path difference is; the wave path difference can be ignored when the Cross-eye jamming structure based on forwarding path optimization is far away from the jammed radar (r>3 km), where the phase difference satisfies the jamming requirement.