In this paper, a new control method based on model predictive control (MPC) theory is proposed for interleaved parallel bi-directional DC-DC converter, which can be applied in the stand-alone photovoltaic energy storage system. Firstly, the prediction model is established according to the equivalent circuit model of the converter under different switching states. Then the cost function is built to evaluate the performances of the converter. Finally, the switching state in the next sampling period is determined by minimizing the cost function, which reduces the switching transition between charging/discharging for battery and balances the two inductor currents. Simulation results show that, under the photovoltaic power changes and the load changes, DC bus voltage has been kept at the setting value with an overshoot less than 2%. As well, the switching transition between operation modes of the converter has been shorten to 10ms and two inductor currents are almost the same. The results verify that good static/dynamic performances and current sharing have been achieved by using the proposed method.