Landing leg mechanism of working machine and working machine

The utility model relates to the technical field of working machinery, and provides a supporting leg mechanism of working machinery and the working machinery, the supporting leg mechanism comprises a supporting leg arm and a supporting leg seat arranged on the supporting leg arm, a cavity is arranged in the supporting leg arm, and a first partition plate is arranged in the cavity. The first partition plate divides the cavity into the first cavity used for storing the solid balance weight materials and the second cavity used for storing water, integration of the two kinds of balance weight materials can improve the supporting stability of the whole supporting leg mechanism, by filling of the solid balance weight materials, when vibration is generated in the operation process, the solid balance weight materials are slightly affected by vibration, and the service life of the supporting leg mechanism is prolonged. According to the supporting leg mechanism, a relatively stable state can be kept, even if water impa