The utility model discloses a but, rotatory mobile Workbench that is used for cylinder reboring machine of two boring cutter heads. It includes base, platform motor, lead screw, bearing frame support, bearing frame, motor cabinet support, motor cabinet, side rail brackets, side guide rail, rail block, mobile Workbench, revolving stage roof, the hydraulic pressure revolving stage of boring machine. The utility model is suitable for a boring machine, especially the time difference between finish boring and the heavy boring is taken all factors into consideration to the requirements of the processing of the cylinder reboring machine of two boring cutter heads, through the removal and the rotatory opportunity of rationally optimizing loading and unloading of workstation, has practiced thrift latency, has improved production efficiency greatly, simultaneously the utility model discloses a track structure of disconnect -type, the subsequent processing of square through hole structure handling ease in -process smear metal simultaneously, has been adopted to the fine setting of the guide rail of being convenient for on main workstation top surface.