A landing gear includes a fixing mechanism, a driving mechanism disposed on the fixing mechanism, a translating member connected to the driving mechanism and configured to move relative to the fix mechanism whey being driven by the driving mechanism, and two supporting feet disposed opposite to each other. The two supporting feet are pivotally connected to the fixing mechanism and movably connected at two ends of the translating member. The driving mechanism is configured to drive the two supporting feet through the translating member to rotate relative to the fixing mechanism.