A　simple　wide-bandgap　conjugated　polymer　based　on　indoloquinoxaline　unit　(PIQ)　has　been　newly　designed　and　synthesized　via　cheap　and　commercially　available　starting　materials.　The　basic　physicochemical　properties　of　the　PIQ　have　been　investigated.　PIQ　possesses　a　broad　and　strong　absorption　band　in　the　wavelength　range　of　400　similar　to　660　nm　with　a　bandgap　of　1.80　eV　and　lower-lying　highest　occupied　molecular　orbital　energy　level　of　-5.58　eV.　Polymer　solar　cells　based　on　PIQ　and　popular　acceptor　Y6　blend　display　a　preliminarily　optimized　power　conversion　efficiency　of　6.4%.　The　results　demonstrate　indoloquinoxaline　is　a　promising　building　unit　for　designing　polymer　donor　materials　for　polymer　solar　cells.