The invention relates to the field of reel material printing and coating production. According to the technical scheme, the winding drum material unwinding and winding printing tandem axle-free fixingunit comprises a base, a left wall plate, a right wall plate, a material rotating disc, a transposition power motor, a first left clamping machine head, a first right clamping machine head, a secondleft clamping machine head, a second right clamping machine head, a first gap bridge transmission mechanism and a second gap bridge transmission mechanism, wherein the left wall plate and the right wall plate are vertically fixed to the left side and the right side of the base, the two ends of the material rotating disc are rotationally positioned on the left wall plate and the right wall plate correspondingly, the transposition power motor drives the material rotating disc to rotate, the first left clamping machine head and the first right clamping machine head are coaxially installed on thematerial rotating disc at an interval so as to clamp an A-axis winding drum material, and the second left clamping machine head and the second right clamping machine head are coaxially installed on the material rotating disc at an interval so as to clamp a B-axis winding drum material. The unit can adapt to winding drum materials with different widths, manual shaft stringing is not needed, the labor intensity of workers is greatly relieved, the winding drum materials are driven to rotate through bilateral transmission, and the unit has the advantages of being reasonable in structure, reliablein work, convenient to operate, suitable for automatic application and high in production efficiency.