The invention provides a passive stability-enhanced deformable undercarriage air-ground flying 
robot which comprises a body, deformable undercarriage devices, wing 
fuselage protection frames, rotor devices, an 
electromagnetic shielding cabin and an automatic 
pilot, wherein a general mechanical extension interface with one rotational degree of freedom is installed at the upper part of the body, the interface is provided with a 
CAN bus connection port, and end work modules can be connected according to different tasks; the deformable undercarriage devices are installed on the body, and diversion trenches are arranged on the deformable undercarriage devices so as to provide passive stability-enhanced 
airflow for the 
robot provided by the invention; the wing 
fuselage protection frames are installed at the tails of the deformable undercarriage devices; the rotor devices are installed on the body; the 
electromagnetic shielding cabin is installed at the lower part of the body; the automatic 
pilot is installed in the 
electromagnetic shielding cabin; and the automatic 
pilot respectively drives the deformable undercarriage devices to realize switching between a flying mode and a ground mode of the 
robot provided by the invention. According to the invention, 
propeller protectors, undercarriages and passive stability enhancers are integrated in the deformable undercarriage devices, so that the self-weight is reduced, and the viability of power components and effective loads in complex environments is improved.