The invention discloses an online compression roller adjustment apparatus of a paste-coating machine. The online compression roller adjustment apparatus comprises the paste-coating machine; a grid is used for paste coating in the paste-coating machine; guiding shafts used for guiding paste-coating paper into the upper and lower surfaces of the grid are arranged at the left and right ends of the paste-coating machine respectively; a roller pressing seat is arranged at the material outlet end of the paste-coating machine; the roller pressing seat is provided with a carving roller and a smoothening roller; the corresponding guiding shaft guides the paste-coating paper below the carving roller and then the paste-coating paper is pressed on the upper surface of the grid by the carving roller; the carving roller comprises an upper roller and a lower roller; the grid moves between the upper roller and the lower roller; and the smoothening roller also has two roller wheels as the carving roller. By virtue of the additionally provided carving roller, the binding performance between the paste-coating paper and the grid is improved; meanwhile, by virtue of an adjusting seat, gaps can be adjusted online; and in addition, the online compression roller adjustment apparatus is simple in structure, convenient to operate, and capable of greatly improving the compression efficiency of the paste-coating paper.