High-purity treatment device and method for aluminum alloy melt

The invention discloses an aluminum alloy melt high-purification treatment device. A particle refining agent automatic control mechanism, a rotary graphite rod and a graphite baffle are in system linkage and are fixedly connected above a crucible for melt purification treatment through a system bracket; the rotary graphite rod is hollow and forms a through hole channel along the length direction; the graphite baffle is arranged close to the rotary graphite rod; and the particle refining agent automatic control mechanism is connected with an inert gas source through a three-way pipeline. The invention further discloses a high-purity treatment method for the aluminum alloy melt, which comprises the following steps: firstly, adjusting the temperature of the melt, descending the rotating graphite rod with the through hole channel and the baffle plate to a specified depth position of molten aluminum along with the system bracket, and starting melt refining and degassing treatment; and after treatment is completed,