Large-area concrete dividing joint forming tool

The utility model discloses a large-area concrete dividing joint forming tool, belongs to the technical field of concrete, and adopts the technical scheme that the large-area concrete dividing joint forming tool comprises dividing strips, the fixing assembly is used for fixing the dividing strips, the moving rod enables the dividing strips to move up and down, the limiting assembly limits the positions of the dividing strips, a plurality of sealing blocks are fixedly connected to the bottom faces of the dividing strips, the fixing assembly comprises a fixing base, sealing grooves corresponding to the sealing blocks are formed in the top face of the fixing base, and the fixing base is fixedly connected with the moving rod. The number of the moving rods is multiple, one end of each moving rod is fixedly connected with the top face of the fixed base, the length direction of each moving rod is perpendicular to the length direction of the fixed base, the limiting assemblies are connected with the dividing strips a