Cd1, the MD1 section silk bolting spring electric hoist is one kind of light small its heavy equipment, has the structure to be compact, the weight is light, the volume is small, the spare part versatility is strong, operation simple and so on merits. The reduction gear uses the hard tooth face rotation design, the life is long, the mechanical efficiency is high. The electrical machinery uses the cone-shape rotor to apply the brake electrically operated several, has the high and low bidirectional security stop block.