The invention relates to a piston aluminum ingot used for a turbo charger car. The piston aluminum ingot solves the technical problem that the mechanical property of an aluminum alloy piston in an engine of an existing car is poor, and aluminum scraps generated in the mechanical finishing process of the piston are wasted. Chemical components of the piston aluminum ingot comprise, by weight percent, 11.8-12.8% of Si, 3.0-3.5% of Cu, 0.7-1.0% of Mg, 2.0-2.5% of Ni, 0.1-0.2% of Ti, 0.09-0.2% of Zr, 0.09-0.18% of V, 0.006-0.02% of P, smaller than or equal to 0.5% of Fe, smaller than or equal to 0.2% of Mn, smaller than or equal to 0.12% of Zn, smaller than or equal to 0.05% of Cr, smaller than or equal to 0.01% of Pb, smaller than or equal to 0.02% of Sn, smaller than or equal to 0.002% of Sr,smaller than or equal to 0.001% of Na, smaller than or equal to 0.005% of Ca, smaller than or equal to 0.005% of Sb and the balance Al. The piston aluminum ingot is widely applied to the car with theturbo charger structure and a plug-in hybrid power car.