The constant temperature mixing and shaking metal bath is a constant temperature oscillator that combines a DC brushless motor and semiconductor refrigeration technology. The semiconductor refrigeration technology can quickly stabilize at the target temperature after reaching it, saving waiting time. At the same time, it combines the functions of constant temperature and shaking well, making it an ideal automated tool for sample incubation, catalysis, mixing and preservation and other reaction processes. It has multiple functions such as heating, shaking and refrigeration, which can meet the needs of different users.