The invention relates to an aluminum alloy material for special-type high pressure oil pump cases, which contains the following chemical components in percentage by mass: 1.8-2.1% of silicon, 0.5-0.7% of copper, 5.8-6.1% of magnesium, 3.2-3.4% of manganese, 2.6-2.8% of titanium, 0.9-1.2% of iron, 0.3-0.4% of Li, 0.03-0.05% of Ba, 0.3-0.6% of bismuth and the balance of aluminum. By adding the magnesium, the alloy has excellent thermal conductivity, high temperature resistance and favorable corrosion resistance. By adding the titanium, copper and iron, the aluminum alloy material has the characteristics of high die casting yield, compact casting, high finished product strength, no crack, high flexibility and favorable air tightness. By adding the silicon, the aluminum alloy material has favorable wear resistance. The aluminum alloy is suitable for special-type high pressure oil pump cases, and has long service life. When the refining agent is used for casting production, the porosity in the casting is lowered by 1-2 degrees, the oxide inclusion content is lowered by 2 levels or so, and the yield is obviously enhanced.