Abstract: A deformable SiC_P/Al composite was fabricated by squeeze casting technique using an SiC particle preform with a controllable volume fraction which was made by adding aluminum powder into the preform. The deformability of the SiC_P/Al composite was studied by hot extrusion and the effect of the hot extrusion on microstructure and properties of the composite was investigated. The results show that the 25vol% SiC_P/Al composite fabricated by the modified squeeze casting method could be extruded successfully by an extrusion ratio of 25∶1, and the strength, modulus and tensile elongation were improved by the hot extrusion.