One-armed Heavy Electrical Pendant is a new and practical man- machine incorporate equipment used in modern operation rooms. With the function of electrical moving up and down, and horizontal rotation, medical workers can manipulate this equipment easily. All kinds of terminals such as for medical gas, electricity, network are gathered on the control board. With the pneumatic brake and damper device, excursion is successfully prevented. Some medical machines of certain weight can be placed on the board or in the drawer. Medical gas terminals imported from Germany and imported motor make the euqipment more reliable. Swivel arm by a high-strength aluminum alloy extrusion molding has high carrying capacity and streamline shape. In a word, this equipment is a perfect workstation for medical workers.