An optimal dispatching method for regenerative electric heating considering the heating reliability and power constraint of distribution network is proposed. Firstly, based on the load heat demand, the heating load prediction models are built, and the regenerative electric heating equipment and system are modeled. Then, the load power model of distribution network is established. Finally, with the restriction of transmission power of distribution network and heating reliability, an optimal dispatching method of regenerative electric heating considering the heating reliability and constraint of the distribution network is proposed. In order to minimize the daily operation cost and the deviation degree between the actual power consumption of electric heating equipment and of the load power curve delivered by the power grid, the optimal scheduling scheme of the electric heating system is determined.The example results show that the proposed method can make the best of the heat storage of regenerative electric heating under the premise of considering the power constraints of distribution network, which can effectively improve the operation safety of distribution network and the reliability of heating for users.