The invention discloses a magnesium alloy quenching-ageing integration apparatus. The apparatus comprises a hot air quenching device, a hot medium quenching device and a hot medium ageing device which are sequentially connected through a transmission device; the hot air quenching device comprises a box body and a track used for conveying a material, and the sidewall of the box body is provided with a plurality of hot air jet holes; the hot medium quenching device comprises a quenching medium groove and a hollow rotating wheel disc positioned in the groove, the rotating wheel disc is provided with a plurality of spaces used for accommodating the material, and a temperature control device and a heating device are arranged in the quenching medium groove; and the hot medium ageing device has a same shape with the hot medium quenching device and has a larger size than the hot medium quenching device, the hot medium ageing device comprises an ageing medium groove and a hollow rotating wheel disc positioned in the groove, the rotating wheel disc is provided with a plurality of spaces used for accommodating the material, and one temperature device and one heating device are arranged in the ageing medium groove. The magnesium alloy quenching-ageing integration apparatus has the advantages of simultaneous realization of quenching and ageing, working time shortening, process reduction, and reduction of the quenching cracking probability of a magnesium alloy material.