In light of the lower performance-price ratio of the ice-melting device and the relatively strong periodicity in its application，a hybrid high power DC ice-melting source with static synchronous compensator（STATCOM）function is put forward.Based on analysis of topology operation principle and operation switching process，the equivalent circuit and mathematical model of power unit and main circuit are deduced on the condition of STATCOM and DC ice-melting application.Modulation strategy，unit operation mode and control method are studied under STATCOM and DC ice-melting mode，and a new way for the unit balance is given.Simulation and test results show that this hybrid high power DC ice-melting source has better reactive power compensation and DC ice-melting effects.Consistent with the analysis，the results also verify the correctness of topology and control method.