The invention discloses a framework mechanism of an aircraft and the aircraft. The framework mechanism of the aircraft comprises a first framework body, a second framework body, a third framework body, and a fourth framework body, wherein the first framework body is provided with a hollow cavity and a side wall encircling the hollow cavity, in addition, an engine arm mounting base, close to the top face of the first framework body, is formed on the side wall; the second framework body is connected to the bottom face of the first framework body, and covers an opening, formed in the bottom face of the first framework body, of the hollow cavity opening; the third framework body is connected to the bottom face of the second framework body, and a footpad mounting base is formed on the side edge of the third framework body; and the fourth framework body is connected to the bottom face of the third framework body, and a shell mounting base is formed on the side edge of the fourth framework body. By adoption of the framework mechanism, integration of an engine arm, a footpad, a control device and an aircraft shell is achieved, when the aircraft is not working, the engine arm and the footpad can be put back in the shell and close to the framework mechanism, and accordingly breakages of the engine arm and the footpad caused by accidents can be prevented.