The utility model discloses a specialized tool is fixed to portable reinforcing bar, including first swash plate, second swash plate, diaphragm and riser, the both ends of first swash plate are all articulated with the one end of diaphragm and riser through the pivot, the both ends of second swash plate all link to each other with the other end of diaphragm and riser is fixed through the screw to the middle part of first swash plate and second swash plate is passed through the fix with screw and is linked to each other. This specialized tool is fixed to portable reinforcing bar, during if any the demand of adjustment interval, only needing move the reinforcing bar through all offer the through -hole that the equidistance arranged on first swash plate and second swash plate on, just can suitably adjusting the interval, avoid reducing its cost of manufacture to the different different models of interval preparation, and hinge through the pivot between first swash plate and diaphragm and the riser, pass through screw fixed connection between second swash plate and diaphragm and the riser, the convenience dismantlement has realized convenient to carry's purpose.