The effects of additives (MgO-Al2O3-SiO2, Al2O3-SiO2, Si3N4, SiC) On the properties and structure of hot-pressed aluminium titanate ceramics were studied. The results showed that the bending strength of aluminium titanate ceramics with additives was improved greatly, while the thermal expansion coefficient was also increased due to the change of structure for aluminium titanate ceramics. The results of X-ray diffraction patterns showed that a solid state reaction occurred between the additives and aluminium titanate, and a solid solution was formed.