The invention discloses a forming method for a nano particle reinforced aluminum-based 
composite material and belongs to the field of 
metal casting forming. Nano 
ceramic powder and micro size aluminumpowder or aluminum 
alloy powder are prepared into mixed 
powder with the nano 
ceramic particle content being 3-10%, the mixed powder is mechanically mixed into composite powder in a seal tank under 
argon protection, and the composite powder is hot-pressed into prefabricated blocks with the quality being about 150-200 g. The prefabricated blocks are melted after reaching about 750 DEG C, then mechanical stirring is conducted, and then high-energy supersonic vibration is conducted. Through ultra-low-speed laminar flow 
pressure casting, a 
composite material melt is pressed into a mold cavity of amold, mold opening is conducted for piece taking-out, and a nano 
ceramic particle reinforced aluminum-based 
composite material part with the 
mass fraction being 3-10% is obtained. According to the forming method for the nano particle reinforced aluminum-based composite material, the forming technique is simple and easy to achieve, the effect is good, and the problems that in 
casting, a 
ceramic particle reinforced aluminum-based composite material with the high 
mass fraction is large in 
viscosity and poor in liquidity, and ceramic particles are easy gathered are solved.