Coaxial reversal dual-rotor unmanned helicopter

The invention relates to the technical field of unmanned helicopters, and discloses a coaxial reversal double-rotor unmanned helicopter which comprises a whole unmanned flying platform, the whole helicopter is a composite fuselage, an empennage is arranged at the tail of the fuselage, a wheel type undercarriage is arranged at the bottom of the fuselage, and a coaxial rotating shaft is further arranged on the fuselage. The rotor system, the control system, the transmission system, the power system and the avionics flight control system are arranged on the fuselage, and the transmission system is used for connecting the power system and the coaxial rotating shaft; the rotor system comprises rotor blades, limiters, and an upper rotor hub and a lower rotor hub which are mounted on a coaxial rotating shaft; the control system comprises a control steering engine, an external variable-pitch pull rod, an internal variable-pitch pull rod, an upper rotor wing automatic inclinator and a lower rotor wing automatic inclin