The invention discloses a position adjusting mechanism for a taping machine clamping mechanism. The clamping mechanism comprises a plurality of clamping units arranged according to a coil contour. The plurality of clamping units form a clamping contour adapted to the coil contour. The position adjusting mechanism is connected between the plurality of the clamping units. The plurality of clamping units can be driven to generate relative shift through the adjustment of the position adjusting mechanism, and thus the clamping contour formed by the plurality of clamping units is changed. The position adjusting mechanism connected between the clamping units can effectively avoid the trouble, and the relative position between the clamping units can be adjusted through buttons on an operation panel of a taping machine according to the coil contours with different sizes so as to be adapted to the coil without dismounting the clamping units. The operation is simple and fast. The work efficiency is greatly improved. The artificial cost is reduced, and the equipment service life is prolonged.