The invention discloses a high-current balance ARM control system for lithium-iron batteries. The high-current balance ARM control system for the lithium-iron batteries comprises at least two lithium-iron batteries connected in series, first contactors, second contactors, a high-current discharge resistor, a lithium-iron battery voltage detection module, an ARM controller and a protection device, wherein the first contactors and the second contactors are equal to the lithium-iron batteries in quantity; the ARM controller obtains voltage of the lithium-iron batteries through the lithium-iron battery voltage detection module; and the lithium-iron battery with the highest voltage is discharged through the high-current discharge resistor according to set time when the balance degree between the lithium-iron batteries is greater than a set threshold. ARM is adopted by the system as a main balance controller, so that the control speed and the stability are improved. By adopting a contactor matrix mode, high-current discharging of the lithium-iron batteries is achieved to improve the balancing reliability and to achieve high-current discharging. The system disclosed by the invention is simple in structure, convenient to operate, safe, reliable and good in balancing effect.