Abstract: The present application relates to the technical field of power grid ice-melting, in particular to an AC short-circuit ice-melting control method and an ice-melting distribution transformer. The present application includes a distribution transformer with dual functions of voltage reduction and ice-melting, an ice-melting control system and its control method. The transformer is equipped with two groups of low-voltage output terminals, which are respectively used for power distribution supply and ice-melting operations; the ice-melting control system includes a local intelligent control box and a remote communication control box, and uses a deep reinforcement learning model to calculate the optimal ice-melting power gear and ice-melting time.