Abstract: The data transmission rate will be update to 100 Mb/s in future mobile communication system, which require to supply multimedia traffic. So, high spectrum effective and great capacity techniques need to be researched. In this paper, we put forward a random access information bearing method, in which a constant amplitude zero auto-correlation (CAZAC) sequences is added by a cyclic code shift keying (CCSK) sequences, and the CCSK sequences are constructed by circle shifting of m sequences. With the method, the mutual interference of two sequences will be reduced. To cancel the interference, one power ratio adjustment technique is proposed, which is able to improve detection performance dramatically by simulation.