Landing leg structure, chassis component and turnout paving and replacing machine

The invention discloses a supporting leg structure, a chassis component and a turnout paving and replacing machine, and the supporting leg structure comprises a fixed beam, a supporting leg, a supporting leg, a supporting leg and a supporting leg, and the fixed beam is internally sleeved with a telescopic part moving in the axial direction of the fixed beam; the fixed supporting leg is fixedly connected with the telescopic part, and a telescopic supporting leg assembly is coaxially arranged in the fixed supporting leg in a sleeved mode; and the rotary driving part is fixedly connected with the telescopic end of the telescopic supporting leg assembly, and an output shaft of the rotary driving part is connected with the mounting seat to drive the mounting seat to rotate around the axial direction of the output shaft. Compared with the prior art, the supporting leg structure, the chassis component and the turnout paving and replacing machine can meet the requirements of turnout transportation width, hoisting hei