The invention belongs to the technical field of flywheel shells, and particularly relates to a die-casting aluminum flywheel shell which comprises a shell body, a reinforcing plate is welded to one side of the shell body, an oil hole is formed in one side of the shell body, a connecting end is arranged on the oil hole, an oil pipe connecting hole is formed in the oil hole, and a mounting connecting plate is welded to one side of the reinforcing plate. A plurality of mounting holes are formed in one side of the mounting connecting plate, a plurality of first reinforcing strips are welded to the outer ring of the shell, first connecting fixing plates are welded to the sides, close to each other, of the first reinforcing strips, a crankshaft hole is formed in one side of the shell, a wheel groove is formed in one side of the shell, and a reinforcing table is welded to one side of the wheel groove; second reinforcing strips are welded to one side of the reinforcing table, and second connecting fixing plates are welded to the sides, close to each other, of the second reinforcing strips. The overall design is reasonable, operation is easy, the weight burden is effectively relieved, the overall structure is firm, and the cost is effectively reduced.