Reverse sealing manhole assembly disassembling and assembling device

The utility model relates to the technical field of manhole components, and particularly discloses a reverse sealing manhole component dismounting device, which is characterized in that a plurality of rollers are rotatably connected to a base, a lifting arm consists of a plurality of groups of hinged shearing rods, one end of the upper end of the lifting arm is hinged with a support table, and the other end of the upper end of the lifting arm is slidably connected with the support table; one end of the lower end of the lifting arm is in sliding connection with the base, the other end of the lower end of the lifting arm is hinged to the base, so that the multiple sets of hinged shearing rods can be opened or closed to drive the supporting table to move in the vertical direction, and one end of the pull rod can be detachably connected with a manhole cover of the back-sealing manhole assembly. An operator can open or close the multiple sets of hinged shearing rods, then the supporting table is driven to ascend a