Protective device for mounting equipment of multi-rotor unmanned aerial vehicle

The protection device comprises an unmanned aerial vehicle body and the mounting equipment arranged below the unmanned aerial vehicle body, a top plate is arranged on the lower side face of the unmanned aerial vehicle body, a bottom plate is arranged below the top plate, and the mounting equipment is located on the upper side face of the bottom plate. Four fixed connecting columns connected with the left side face and the right side face of the bottom plate and the lower side face of the top plate are arranged on the periphery of the mounting equipment, and two sliding connecting columns capable of sliding on the front side face and the rear side face of the bottom plate and the front side face and the rear side face of the top plate are arranged on the front side face and the rear side face of the mounting equipment correspondingly; an air bag A is bonded to the lower side face of the bottom plate, a foldable air bag B and a foldable air bag C are arranged on the opposite side faces of the lifting plate and