Ann tears simple and convenient tunnel supporting rack open

The utility model discloses an ann tears simple and convenient tunnel supporting rack open, include: table surface has horizontal up end, the supporting part, the support table face, including a plurality of parallel expansion brackets, every the expansion bracket includes two hinge bars, every the hinge bar articulates with in the middle part of the pole unit including a plurality of pole units of head and the tail articulated, two hinge bars in order, table surface is connected to the expansion bracket upper end, concertina movement is to drive division, drive telescopic frame in vertical direction, including connecting the screw rod at the expansion bracket lower extreme. The beneficial effects of the utility model are that adopt the expansion bracket to constitute the supporting part of strutting the rack, not only can adjust this height of strutting the rack, more can realize flexible accomodating, put convenient transport, installation and dismantle, the bottom adopts the screw rod as the drive division