In　this　paper,　we　study　a　multi-user　multi-relay　interference-channel　network,　where　energy-constrained　relays　harvest　energy　from　sources＇　radio　frequency　(RF)　signals　and　use　the　harvested　energy　to　forward　the　information　to　destinations.　We　adopt　the　interference　alignment　(IA)　technique　to　address　the　issue　of　interference,　and　propose　a　novel　transmission　scheme　with　the　IA　at　sources　and　the　power　splitting　(PS)　at　relays.　A　distributed　and　iterative　algorithm　to　obtain　the　optimal　PS　ratios　is　further　proposed,　aiming　at　maximizing　the　sum　rate　of　the　network.　The　analysis　is　then　validated　by　simulation　results.　Our　results　show　that　the　proposed　scheme　with　the　optimal　design　significantly　improves　the　performance　of　the　network.