For existing defects of poor error performance in correlation delay shift keying (CDSK), a chaotic communication scheme named multiple ary multiple user CDSK with no intrasignal interference (NISIMAMUCDSK) is proposed. According to the multiple users’ data information in transmission, the scheme makes each user’s binary data symbol grouping and mapping for multiple ary symbol. At the same time, the delay structure of the CDSK system is replaced by encoding a set of mutually orthogonal Walsh code sequences to eliminate the intrasignal interference during the demodulation. The bit error rate (BER) formula over additive white Gaussian noise (AWGN) channel and Rayleigh fading channel is derived and MonteCarlo simulation experiments are worked. Theoretical analysis and simulation results show that the new scheme proposed can effectively improve bit error rate performance and transmission rate, which indicates good practical application feasibility in the chaotic communication field.