Interference alignment (IA) is an effective approach for interference management in wireless networks. Nevertheless, the interferences in IA networks are usually leveraged to separate out the desired signal and then discarded, instead of re-utilizing the interferences. Recently, wireless power transfer (WPT) has been introduced to harvest energy in IA networks, however, its performance still can be improved. In this paper, we propose a novel WPT based on angle switching (WPTAS) scheme to further improve the performance of WPT in IA networks. Since the optimization problem of the WPTAS scheme is difficult to solve, we develop a suboptimal algorithm for WPT-AS with low complexity. Simulation results are presented to show the effectiveness of the WPT-AS scheme to improve the performance of WPT in IA networks.