Rana nigromaculata breeding device

The rana nigromaculata seedling raising device comprises a seedling raising plate and an automatic constant-temperature maintaining structure, and the automatic constant-temperature maintaining structure is arranged in the seedling raising plate; the automatic constant-temperature keeping structure comprises a storage bin formed in the bottom of the interior of the seedling raising plate, the storage bin is filled with heating liquid, and a constant-temperature electric heating wire immersed in the heating liquid is fixedly connected to the interior of the storage bin. The constant temperature of the heating liquid is guaranteed through the constant temperature electric heating wire, when the temperature of the seedling culture liquid deviates, the heating liquid can be pumped into the heat exchange bin, the temperature of the heating liquid is exchanged into the seedling culture liquid through heat exchange of the efficient heat conduction plate, and then the temperature of the seedling culture liquid is cha