In　this　paper,　a　complexity-reduced　turbo　decoding　scheme　by　using　concatenated　BCH　codes　is　presented.　Multiple　BCH　coded　packets　with　different　length　are　used　to　form　one　data　frame　for　turbo　encoding.　With　error　correction　capability,　BCH　codes　can　help　to　lower　down　the　overall　decoding　error　floor.　Furthermore,　with　the　excellent　error　detection　capability　of　BCH　codes,　the　correctly　decoded　short　packets　could　be　detected　early　and　used　to　constrain　the　turbo　decoding　trellis.　Both　improvement　in　decoding　performance　and　reduction　in　decoding　complexity　are　observed　in　simulations.