The utility model belongs to the technical field of the two-way pretensioned prestressing track board of high-speed railway CRTSIII template formula ballastless track is prefabricated, dismantle the difficulty for solving present connector, hardly adjust the technical problem of the position of anchor board in the template, provide an adjustable connector that is used for the prefabrication of CRTS III type track board, including cylindrical connector main part and slotted nut, both ends female through-hole is established to cylindrical connector main part axial, and the both ends of cylindrical connector main part still symmetry are provided with the convex open slot, and the slotted nut leads to long fluting along the axis direction, and the external screw thread and the through-hole internal thread of slotted nut suit the utility model discloses simple structure, it is all very convenient to use and dismantle, can conveniently adjust the stretch-draw pole in addition and adjust the position of anchor board in the template, has improved the efficiency of construction, has guaranteed the prefabricated quality of track board