Abstract: Equipment for dual-ingot LFEC casting of 7075 aluminum alloy was developed utilizing a low frequency electromagnetic casting(LFEC) method. The equipment was used to achieve continuous and stable casting of the 7075 aluminum alloy, thus providing an experimental basis for muti-ingot LFEC in industrial production. The effects of different magnetic fields on the structure of 7075 aluminum alloy were compared using dual-ingot LFEC. When the current direction of adjacent coils was opposite, ingot macrostructure was better than with current oriented in the same direction; and grains were gradually refined as current increased. The best magnetic effect was achieved when current intensity was greater than 160A. Alloy microstructure was not improved when current frequency was less than or equal to 10Hz, or greater than or equal to 30Hz. At a current frequency of 20Hz, grains were relatively small and homogenous, while macrosegregation was significantly inhibited.