The invention discloses a high-load and high-stability composite aircraft, relates to the technical field of aircrafts, and aims to overcome the technical defects that an existing multi-rotor aircraft is low in
load capacity, and a lifting body aircraft is poor in wind resistance and prone to unbalance during unloading. The composite aircraft comprises a lifting body, a multi-rotor
system and a connecting structure, the lifting body and the multi-rotor
system are in flexible connection, and net lifting force provided by the lifting body corresponds to 80%-100% of the weight (after loads are removed) of a multi-rotor empty aircraft; the multi-rotor
system adopts a scene-divided power dynamic adjusting mechanism, the multi-rotor system provides lift force accounting for 0%-20% of the weight of the multi-rotor air aircraft to maintain balance in the no-load state, the multi-rotor system bears all the load weight in the
heavy load state, and the balance of the whole composite aircraft system is maintained by rapidly reducing the power to 0%-20% of the weight of the multi-rotor air aircraft in the unloading state. By means of the three-in-one
collaborative design of the structure, the strategy and the mechanism, the loading capacity of the multiple rotors is improved by 50%-150%, the large load, the control flexibility and the wind resistance stability are all considered, the multi-rotor multi-rotor unmanned aerial vehicle can be widely applied to large-load hoisting scenes such as
plateau material transportation and mountainous area
engineering hoisting, and the market blank is filled.