In this experiment, the 12 batches of Marcrobrachium rosenbergii from last year were bred and high growth individuals were selected through 3 step breeding program, under SPF environment. Size of top 2~5％in male 50 each and female 150 each were kept for the future mass production of seed and further selection for better growth and survival. Zero-water exchange larval rearing techniques were developed in FRP tanks of 0.5T and 10T. In 7 experiments used 0.5T tanks, stock density was 63 larvae/ml in average, produced 339,600 post-larval in total, 59.5％ in survival and yielded 38 post-larval/ml. In 3 experiments used 10T tanks, stock density was 100 larvae/ml in average, produced 1,350,000 post-larval in total, 45.0％ in survival and yielded 45 post-larval/ml. Compared with 10T tanks, 0.5T tanks were lower in stock density, resulted in higher survival but low yield.