Bullacta exarata (Philippi) is monoecious, reproduction is by crossfertilization. The reproduce period is from the end of March to the last ten-days of November along the coast of Zhejiang Province. The fertilized egg is protected by an egg-capsule membrane After cleavage, it is developed to gastrula, then trochophora larva, which incubates at the viliger larva stage. During artificial spats-rearing, potassium permanganate [0.28-0.9(×10-6.)]can increase hatching rates During viliger and pediveliger rearing, potassium permanganate [0.5-1(×10-6)] or formalin [5-10(×10-6)] can reduce the amount of destructive microbes and animalcules.In the pediveliger stage, it must put in adherent sea-mud. This paper presents artifical spats-rearing technology in various stages, suggests how to increase hatching rates and discusses the drugs during the rearing period.