An improved distributed turbo coding(DTC)scheme,namely,systematic-bit-selection DTC,is proposed for a two-hop relay network implementing selective-relaying(SR).In the scheme,source broadcasts a punctured turbo code in order to increase the successful decoding rate of relay.The relay forwards systematic-bit to the destination in case of successful cyclic redundancy check(CRC).From the two versions of systematic-bit coming from relay and source respectively,the destination selects the one with higher signal-to-noise ratio(SNR)for turbo decoding.Simulation results show the improved bit error rate(BER)performance of our scheme. An improved distributed turbo coding (DTC) scheme, namely, systematic-bit-selection DTC, is proposed for two-hop relay network implementing selective-relaying (SR) .In the scheme, source broadcasts a punctured turbo code in order to increase the successful decoding rate of relay. the relay forwards systematic-bit to the destination in case of successful cyclic redundancy check (CRC) .From the two versions of systematic-bit coming from relay and source respectively, the destination selects the one with higher signal -to-noise ratio (SNR) for turbo decoding. Simulation results show the improved bit error rate (BER) performance of our scheme.