Beam-pumping unit parking brake device and beam-pumping unit

The utility model relates to a beam-pumping unit parking brake device and a beam-pumping unit, and the beam-pumping unit parking brake device comprises a supporting frame which is used for avoiding acrank, a left supporting rod and a right supporting rod, and the left supporting rod and the right supporting rod are movably assembled on the supporting frame in a left-right guiding manner and are respectively used for supporting a left-side crank and a right-side crank. The left supporting rod and the right supporting rod have a working state which is far away from each other and is used for supporting the two cranks, and also have an avoiding state which is close to each other and is used for avoiding the two cranks; the plane connecting rod mechanism comprises a left connecting rod, a right connecting rod and a driving rod, the left connecting rod and the right connecting rod are hinged to the driving rod, the left connecting rod and the right connecting rod are hinged to the left supporting rod and the right