The utility model provides an intermediate rearing device of marine shellfish seed, including the cultivation chamber that is used for cultivating the seed, hold cultivating the water supply of going on supplying water in the chamber, the water storage barrel who follows the field pond and draw water and impound is drawn together to the water supply hand ladle, the last delivery pipe that is connected with of water storage barrel, the cultivation chamber is open -top and the bottom is planar container, it is provided with a baffle to cultivate the intracavity, height of sidewall is less than the lateral wall setting of cultivating the chamber, this baffle will be cultivated the chamber and divide into catch basin and cultivation tank, when the delivery pipe supplies water to the catch basin and the liquid level is too high in the catch basin through the baffle spill over get into cultivation tank in, the last fluid -discharge tube that is connected with of cultivation tank, the fluid -discharge tube communicates realizes circulation water supply in the pond, the liquid outlet position height -adjustable of fluid -discharge tube sets up, this breeding device can solve the problem that the seed survival rate is low, the collection is difficult among the prior art.