A scheme of multi-wavelength optical code-division multiple-access(MW OCDMA) employing optical hard-limiters and RS code is proposed,and its performances of bit error rate(BER) and normalized throughput are analyzed.Analysis results show that,BER of MW OCDMA system is improved by employing optical hard-limiters,and can be further improved by employing RS code additionally.On the other hand,optical hard-limiters can enhance the normalized throughput of MW OCDMA system,and the peak of normalized throughput will be doubled.However,normalized throughput of MW OCDMA system can't be improved by employing RS code additionally.Furthermore,when offered load is not large,normalized throughput of MW OCDMA will be somewhat reduced.