Abstract: Artifical reproduction of Babylonia areolata and B.formosae were taken in this study. The egg capsules of this two Babylonia were held in water temperature 23.6±1.1℃, the hatching time for B.areolata was 7 d and the shell length of firstborn larvae was 482.7±10.6 μm, while the hatching time for B.formosae was 8 d and the shell height of newly hatching larvae was 398.2±10.3 μm. The larvae were reared at 0.1~0.2 ind · mL^-1 in water temperature 25.2±0.9, the growth rate of larval shell height for B.areolata was 33.6 μm · d^-1 and larvae began metamorphosis when the larval shell height reached 1 323.9±118.6 μm after rearing 18 d, while the growth rate of larval shell height for B.formosae was 25.3 μm · d^-1 and larvae began metamorphosis when the larval shell height reached 955.5±174.4 μm after rearing 16 d. The juveniles were reared at 2 100 ind · m^-2 in water temperature 26.5±0.7℃, the growth rate of shell height for B.areolata and B.formosae were 0.21 and 0.20 mm · d^-1, respective.