The invention discloses core removing equipment for increasing the removing speed of an aluminium-oxide-based ceramic core by gas-flow mixing. The core removing equipment for increasing the removing speed of the aluminium-oxide-based ceramic core by gas-flow mixing mainly comprises a normal-pressure alkali boiling core removing device, a nitrogen generator and the like. In the middle and later periods of core removing operation on hollow turbine blades, a core at the deep position of a cooling channel is removed slowly, the primary cause is that alkali liquor at the deep position of the cooling channel moves difficultly, a core removing product at the position cannot drop from the surface of the core by washing generated by movement of the alkali liquor, thus, the core removing product maycover the surface of the core, and rapid reaction of an internal core material and the alkali liquor is stopped. The nitrogen generator in the core removing equipment delivers nitrogen to a positionnearby the core at the deep position of the cooling channel through a corrosion-resistant thin hose, and a gas-flow mixing effect is achieved. By gas-flow mixing, movement of the alkali liquor at thedeep position of the channel can be caused, and the core removing product at the deep position of the cooling channel is facilitated to drop from the surface of the core. By the core removing equipment for increasing the removing speed of the aluminum-oxide-based ceramic core by gas-flow mixing, the problem that the core at the deep position of the cooling channel is removed slowly in a normal-pressure alkali boiling core removing process of the aluminum-oxide-based ceramic core is solved.