The utility model discloses a miniature printing unit with damping performance, including main part, blotter and shock -absorbing spring, the top of base is installed and is beaten printer head, and the surface mounting who beats printer head has the print wire, and the bottom fixed mounting who beats printer head has the blotter, beats printer head's both sides and all installs pressure paper device, presses the one end of paper device to install damping spring, beats printer head's top and installs the lead screw, and fixed the 2nd drive gear that has cup jointed of one end of the needle oftransferring the files, paper feed sprocket is installed to the bottom of lead screw gear. The utility model discloses an effect of playing the buffering when printer head prints work can played to the installation blotter in the bottom of beating printer head, prevent to beat printer head and shake acutely to result in printing because of printing work and make mistakes, simultaneously through install between frame plate and the pressure paper device shock -absorbing spring can prevent to press the paper device because of the utility model discloses a tremble and the displacement appears, cause the printing content on the paper crooked, thus the reinforcing the utility model discloses a practicality.