The invention discloses a foamed aluminum rapid foaming device. The foamed aluminum rapid foaming device comprises a foaming bin, a feeding end opening is formed in one side of the foaming bin, a meltextrusion nozzle is arranged at the bottom of a foaming bin, and liquid aluminum after foaming can be extruded through the melt extrusion nozzle. Foaming agent spraying guns are connected to at leastone side face of the lower portion of the foaming bin, the spraying ends of the foaming agent spraying guns penetrate into the foaming bin, an extruding plate is arranged in the foaming bin, the twoends of the extruding plate are in sliding connection to sliding tracks, the sliding tracks are fixed to the upper portions of the inner walls of the foaming bin, and an air cylinder is connected to the upper portion of the extruding plate. By controlling the stretching and retracting action of the air cylinder to drive the extruding plate to move up and down along the sliding track, the foamed molten aluminum liquid in the foaming bin is extruded through the melt extrusion nozzle. The foamed aluminum rapid foaming device can not only avoid bubbles floating up, but also enables a metal foamedmelt to continue to complete foaming, reduces layering of bubble bodies and liquid in the metal foamed melt, improves the yield, controls the rework rate, and reduces the casting cost.