Distribution transformer three phase current dynamic balance device. The utility model relates to a middle and low voltage electric current balancing unit especially relates to a three phase current developments balancing unit. The automatic realization balances the low pressure supply network, and the expansibility is strong, the reliability is high, the dynamic compensation precision high. Including modular unit, electric current acquisition unit, remote communications unit and human -computer interaction unit. Modular unit connects in parallel in electric wire netting common connecting point, modular unit includes LCL wave filter, dc -to -ac converter, drive circuit and central controller. Central controller, drive circuit, dc -to -ac converter and LCL wave filter connect gradually. Real -time supervision reflects load condition in real time comprehensively, and the in time accurate feeds back to central controller with the electric current condition, and central controller can in real time, dynamicly, accurate adjust three -phase load current, improves the accuracy of dynamic current adjustment, the nimble module that puts into operation that increases and decreases has reduced the product consumption, the energy saving.