Auxiliary setting-out device for construction engineering paying-off

The utility model relates to the field of constructional engineering, in particular to a constructional engineering pay-off auxiliary alignment device which comprises a base, a supporting column placed on the upper end face of the base and a pay-off device installed on the supporting column, a vertical rod is arranged on the lower end face of the supporting column in a penetrating mode, and the lower end face of the vertical rod is installed on the upper end face of the base. Two first connecting rods which are symmetrical along the axis of the supporting column are hinged to the circumferential face of the supporting column, two second connecting rods which are symmetrical along the axis of the vertical rod are hinged to the circumferential face of the vertical rod, and the ends, away from the supporting column, of the two first connecting rods are hinged to the second connecting rods correspondingly. Hinged shafts installed in the supporting column and the vertical rod are horizontally ...