Coral breeding device

The utility model discloses a coral breeding device which comprises a support, a breeding box is arranged in the support, an adjusting device is arranged in the support, and the adjusting device comprises a fixing plate, an oxygen feeding box, a box cover, a bearing, a hollow pipe, a sealing cover, an oxygen feeding pipe, an oxygen machine, a motor, a driving wheel, a driven wheel, a communicating pipe and an air outlet. According to the breeding box, the oxygen introducing box is arranged for conveniently storing a fresh water source and receiving and mixing old water circulated from the interior of the breeding box, so that the situation that oxygen is thin and water is troublesome to change due to the fact that the interior of the breeding box is not irradiated by light possibly is avoided, and when a user needs to add water fully mixed with oxygen into the breeding box, the oxygen introducing box is used for introducing oxygen into the breeding box; a user can start a motor to drive a driving wheel to rot