Primaries are usually regarded as the only seismic signals used for seismic imaging. However, when seismic acquisition encounters some obstacle areas where no shooting can be made and only the installation of receivers can be conducted, there are seismic imaging gaps because of missing seismic primaries. Given the developed multiples in obstacle area, the authors proposed a method achieving joint imaging by using primaries and multiples. The method employs sum of impulsive source and recorded primaries and multiples as source wavefield and the wavefield consisting of recorded primaries and multiples as back-extrapolated wavefield under the 2D deconvolution imaging condition. Tests on Sigsbee2B dataset and field data show that the method could provide more valuable imaging information and complement the lack of seismic primary imaging caused by obstacle topography. Tests on Sigsbee2B dataset and field data show that the method is workable and effective.