This patent is about the impregnation machines for prepreg with heating roller and the manufacturing system for prepreg therewith, It is located up and down to form a rotating upper heating roller and a lower heating roller, and a impregnating device with a structure in which the upper heating roller comes into or out of the lower girder by operation of the cylinder, which facilitates the installation of the prefreg material between the upper heating roller and the lower heating roller, and the prefrig material is heated by the impregnating device and strengthening of the free-frame material.