CDMA is a new generatlOn of multiple access commumcat1on technology. It adopts many new concepts and posesses many new characteristics. Code Interweave techonolgy IS one of the key technologies in it. DSP is a rapidly developing digital signal processmg technology m recent years. This paper studies the implmentatlOn method of the CDMA code interwoven technology in TMS320C3x , then slmulates 1t usmg a computer program. The slmulation result is analysed m the end.