The invention relates to atrina pectinata industrial seedling production, and in particular to a device and method for cultivating atrina pectinata parent shellfish. The device comprises at least one cultivation unit and a wave-making pump, wherein the wave-making pump which can circulate the water flow is arranged on the periphery of the cultivation unit; and each cultivation unit consists of a grid base and a canvas bag which is interwoven in each grid. The culture method comprises the following steps of: putting the atrina pectinata parent shellfish in the device; and cultivating under the conditions of a sediment substrate and circulating water flow to complete the processes of nutrition accumulation and sexual gland maturing. The atrina pectinata parent shellfish is cultivated by utilizing the device disclosed by the invention, the death rate of the atrina pectinata parent shellfish can be effectively reduced, the activity of the atrina pectinata parent shellfish can be improved, and ingestion and nutrition accumulation of the parent shellfish are favored. The device and method disclosed by the invention have the advantages of high cultivation efficiency, convenience for management, simple operation and low labor intensity.