Engineering machinery and supporting system thereof

The invention provides an engineering machine and a supporting system thereof, and the supporting system comprises a swinging part, the first end of the swinging part is hinged to the rear part of the engineering machine, the swinging part can swing around the first end in the horizontal direction, and the swinging part is provided with a swinging position and a retracting position relative to the engineering machine; and the supporting part is arranged at the second end of the swinging part, and the supporting part can move in the vertical direction. When supporting is needed, the swing part swings to the swing position relative to the engineering machine, and the supporting part descends to make contact with the ground and conducts supporting. When supporting is not needed, the supporting part ascends, and the swing part swings to the retracting position relative to the engineering machine. Compared with a fixed type supporting system, the swing type supporting system can swing and retract when supporting i