In recent years, with the goal of understanding the large scale structure around high-z QSO, we have obtained deep r,i,z, band imaging at Large Binocular Telescope (LBT) and Y and J band at CFHT Telescope of the field around the quasar SDSSJ1030+0524 (z=6.3). I present here some results, in particular the photometric catalogue of the sources, the selection process of Lyman break galaxies in the QSO halo and the main properties of these galaxies.
