Multi-rotor machine blade, multi-rotor machine and method for improving static unbalance of blade

The invention discloses a multi-rotor machine blade, a multi-rotor machine and a method for improving static unbalance of the blade. The multi-rotor machine blade comprises a plurality of blades mounted on a blade base, wherein one or more of the plurality of blades is/are equipped with a metal adjustment sheet pair; each metal adjustment sheet pair is mounted at the rear edge of the respective blade and comprises a first dynamic balance adjustment sheet and a second dynamic balance adjustment sheet.