The utility model provides a soft mark heat -seal of fine cable of communicating pincers, is equipped with the hot plate including the clamp main part on two clamping faces of clamp main part, the adjustable ceramic heating sheet that has inlayed in the hot plate, and ceramic heating sheet carries out the heat -seal to plastic labels, the hot plate includes left splint and right splint, corresponds on left splint and the right splint to be equipped with notch and the arch that suits with label length and width, and notch and arch are mutually supported, ceramic heating sheet compresses tightlyon the hot plate through the flexure strip. The utility model provides a pair of soft mark heat -seal of fine cable of communicating pincers through setting up the hot plate that suits with the label, can directly carry out the heat -seal to the label, avoids the label to drop.