The invention relates to a thermo-acoustic driven multiphase alternating current thermo-magnetic power generation system which comprises a plurality of basic units, wherein each of the basic units comprises a thermo-acoustic converting device and a thermo-magnetic power generation device; the thermo-acoustic converting device comprises a main water cooler, a soft magnet regenerator, a heat exchanger, a heat buffering pipe and a resonant tube which are communicated with each other in turn; the thermo-magnetic power generation device comprises a magnetic conductor, a permanent magnet and a coil; the soft magnet regenerator is connected with the magnetic conductor, so that the thermo-acoustic converting device and the magnetic conductor are arranged in a crossing form; a plurality of thermo-acoustic converting devices in the plurality of basic units are in end-to-end connection through the resonant tubes so as to form an acoustic propagating loop structure; one permanent magnet is shared by the thermo-magnetic power generation devices in the basic units; and the two ends of the magnetic conductors in the thermo-magnetic power generation devices are respectively in parallel connection with the two poles of the permanent magnet so as to form a plurality of parallel magnetic loops. The thermo-acoustic driven multiphase alternating current thermo-magnetic power generation system not only can promote the running safety of the system but also can further reduce the construction cost.