The invention relates to a forging technology of a particle-reinforced aluminum-based composite material, which is characterized in that the distribution of ceramic particle bodies and the mechanical property of the composite material can be improved through large deformation of forging. Forging billets are packaged in a hot charging way and then placed into a resistance furnace or a fuel furnace for heating; the temperature is preserved at 300-400DEG C and the temperature preservation time t is determined by the maximum diameter delta max; in such a way that: when the delta max is not more than 100mm, t is equal to 2h; when the delta max is more than 100mm and less than 500mm, t is equal to 6h; and when the delta max is not less than 500mm, t is 10h. When in forging, the deformation amount of a single path is 10-70 percent. After the forging is finished, forging pieces are subject to air cooling, the sheaths are turned and end faces are flattened.