In this paper , a new optical communication technology based on CDMA is introduced. Compared with the technology put forward by the previous literature , lt can increase the system capacity , improve the system speed and get the high process gain , and does not need the ultrashort pulse laser transmltter. It combines the great bandwith of optical fiber with high spectrum utitity factor of CDMA. The techmology can increase the system capacity greatly if combined with DWDM and the pice very low. OCDMA has hugepotential in the CA TV network and high speed LAN.