To improve the bandwidth efficiency in multicarrier transition system,we propose a novel digital communation system based on discrete wavelet transform method.the scale parameters of wavelet base are discreted as reciprocals of integers,rather than integer of 2 in convetional system,thus yhe sub-carrier is not a set of quadraturecarriers,but divided with equal intervals in frequency axis and transmit a signal at each interval.The Matlab simulation results show that the proposed method is superior in bandwidth efficiency,though inferior in BER performance to OFDM system