AlN ceramics is very difficult to be sintered due to its strong covalent bonds and low self-diffusion. In this work, a new hot-press sintering system assisted by vibration was used to densify AlN ceramics. During hot-pressing process an additional vibration caused by pressure fluctuation is imposed on the sample. The well-densified AlN ceramics had been obtained at 1750 degrees C under 15MPa, or at 1800 degrees C under 10MPa which were muchmilder than traditional hot-press conditions and would be beneficial to prolong working life of the graphite mold. The samples made by this method have a bending strength about 320MPa. After annealing, it shows a thermal conductivity of 217W/mK.