Abstract: As the energy saving technology of intermittent supply is used in the beam pumping motor systems, it is demanded that the supply should be rapidly re-switched on after power-off control, without large inrush current. In comparison to the conventional soft starting, the dynamic load torque and the varying motor speed should be considered particularly. To solve this problem, a rapid soft re-switching control strategy was proposed, which can take into account the dynamic load conditions. Firstly, the optimal re-switching time was determined according to the characteristics of inrush current with the different speed and load torque conditions; and the firing angle selection method and the related control strategy for supply re-switching were proposed under the preconditions of reasonable inrush current at the initial moment, as well as, meeting the load when switching to fully sinusoidal supply. With the proposed control strategy, the electromagnetic torque can match the load-torque requirement with restricted inrush current during the re-switching process. An energy saving controller was developed based on the proposed control strategy, and the experimental validation was performed on a 37 kW beam pumping motor in an oil field. By comparing the measured inrush currents under different re-switching strategies, the correctness and the effectiveness of the proposed control strategy were verified.