The application relates to the technical field of die-
casting production and manufacturing of
metal parts, and particularly relates to a high-precision
magnesium alloy die-
casting die device. The device comprises a die mechanism, the die mechanism comprising a first die
assembly, a second die
assembly and a feeding mechanism, the first die
assembly and the second die assembly being provided with a plurality of
accommodation openings on the circumferential side, the
accommodation openings being provided with liquid runners and cavities, the feeding mechanism comprising a feeding cylinder and a
flow divider; a core, the core being located in the cavity during die closing; a core pulling assembly, the core pulling assembly being arranged in correspondence with the core; a overflow
system, the overflow
system comprising an overflow tank, an exhaust passage and an exhaust mechanism; the liquid runner comprising a first liquid runner and a second liquid runner, the first liquid runner being connected with a
tail cavity of the
metal part, and the second liquid runner being connected with a head cavity of the
metal part. The die-
casting metal part of the die device has
high density and good
surface finish, meets the application scenarios with high quality requirements, and can achieve the super-lightweight target in the low-altitude economic field, such as eVTOL, unmanned aerial vehicles and other aircrafts.