The self-weight of aluminum alloy hand hoist of tightener is very light, and its material is aluminum alloy, which is a light metal. In addition, the aluminum alloy material has good magnetism-avoiding performance. Because the aluminum alloy hand-pulled hoist is often used in power operation and is exposed to power for a long time, some metal parts will generate magnetism for ordinary hand-pulled hoist, which will affect the normal use of the hand-pulled hoist and other materials in the working environment, while the aluminum alloy hand-pulled hoist will not have such problems.