The invention provides a seabed coral culture device, belongs to the technical field of sea cultivation equipment and aims to solve the problem that a conventional centralized coral cultivation degree is relatively low. The seabed coral culture device comprises a base and a plurality of culture basin, wherein a plurality of support shafts are connected with the base in a sliding manner; a plurality of support bases are connected with the support shaft in the sliding manner; positioning parts for fixing the support bases on the support shafts are arranged on the support bases; a plurality of fixing rods are arranged on the support bases; positioning screw rods are screwed with four corners of the base; lower ends of the positioning screw rods are sleeved by positioning tubes in the sliding manner; a plurality of positioning claws are hinged with conical surfaces of the positioning tubes; positioning springs are arranged between the upper ends of the positioning tubes and the positioning screw rods; and transmission parts capable of expanding the plurality of positioning claws in a radial direction when the positioning tubes are inserted for set lengths are arranged at the lower ends of the positioning screw rods. The seabed coral culture device can be stably positioned at seabed, and coral can be centrally cultured.