Abstract: In order to achieve the efficient and safe transmission of low-voltage complete electrical cabinet device among laboratories in testing industry, a new type of transmission device is designed through technical research in this paper; and the design ideas, structural features and working principles are mainly described. The practical value of this new transmission device is verified through the actual use. Practice has shown that the transmission device can adjust the height of the gravity center of test samples freely, it ensures the safety of personnel and samples, and greatly improves the convenience, safety and efficiency of the transmission process.