Aluminum alloy engine support casting method and machining device for aluminum alloy engine support casting

The invention discloses an aluminum alloy engine support casting method. The method comprises the following steps that S1, molten aluminum smelting is conducted, wherein the smelting temperature ranges from 730 DEG C to 740 DEG C; S2, mold closing and pouring are conducted, specifically, after mold closing, the molten aluminum is poured into a charging barrel of a casting machine, and the pouringtemperature ranges from 690 DEG C to 700 DEG C; S3, extrusion casting is conducted, specifically, the molten aluminum in the charging barrel is extruded into a mold cavity, the filling speed ranges from 50 mm/s to 180 mm/s, the molten aluminum is crystallized and solidified under the casting pressure of 100 MPa, and the pressure maintaining time ranges from 60 S to 80 S; and S4, the mold is openedand a workpiece is taken out. The engine support manufactured by the method has good mechanical properties. A machining device for aluminum alloy engine support manufacturing comprises a casting machine table, the mold, the c