The group crane electric hoist uses disc brake electromechanical to do work, and the driving reducer slows down. The group crane electric hoist has the characteristics of loose mechanism, small size, light weight, high efficiency, convenient use, and reliable braking and simple protection. Group hoist electric hoist is generally used in processing workshops, warehouses, docks, and various modern production lines and assembly lines in various industries. The group hoist electric hoist is more flexible, quicker, safer and more convenient to use in the workplace with smaller space. The group hoist electric hoist is also suitable for the construction of climbing frames in the field of engineering, lifting of climbing molds, and group hoisting of large oil tanks. The electric chain structure of group hoist electric hoist is composed of three parts: group hoist electric hoist, three-phase disc brake electromechanical and planetary gear reducer. Transmission principle: The rotation of the group hoist electric hoist motor is decelerated by the reducer, and the speed and power are output, so that the electric hoist hoisted down or down. When the electromechanical power supply of the group crane electric hoist is powered off, the brakes relying on the brake electromechanical equipment use the hoist hook to stop the work, and the heavy objects stop at a considerable position.