The utility model provides a novel many rotor unmanned aerial vehicle undercarriage that links, including the first connecting portion and the second connecting portion of mutually supporting, be provided with respectively on the lateral wall of the homonymy of first connecting portion and second connecting portion and give prominence to in the first bellying and the second bellying of lateral wall, both adjacent tip of first bellying and second bellying are articulated, and the other one end of first bellying is articulated with the one end of bracing piece, and the other one end of second bellying hinges with the one end of the hack lever that rises and falls, the other one end of bracing piece is with to rise and fall the hack lever articulated, relative motion through first connecting portion and second connecting portion drive the hack lever realization of rising and falling pack up with development condition's switching. The utility model discloses reduce many rotors collection size, increased descending fulcrum distance and then improved the stability of descending, simplified the operation of many rotors, protected the primary structure of many rotors organism.