The invention discloses a traveling vehicle chassis, which is characterized in that the vehicle chassis comprises an intermediate structure (4), and four traveling landing leg mechanisms (2), which are respectively provided with a landing leg swinging limited locking mechanism (3), are mounted around the intermediate structure (4) in a manner of hinge joint, wherein a detachable landing leg connection cross beam (5) for keeping two traveling landing leg mechanisms (2)at the same side of a longitudinal center line of the intermediate structure (4) balance is arranged between the two traveling landing leg mechanisms (2).