The invention relates to a cationization modifying technology of a
cellulose fiber, and belongs to the technical field of dope
dyeing. The modifying technology of the
cellulose fiber disclosed by the invention comprises the following steps: putting the
cellulose fiber into a container, adding water to the container, then performing modified treatment on the
cellulose fiber by using two kinds of cation modifying agents of a micromolecular
quaternary ammonium salt cation modifying agent and a macromolecular
quaternary ammonium salt cation modifying agent, and after finishing the modified treatment, obtaining the
modified cellulose fiber. The micromolecular
quaternary ammonium salt cation modifying agent is an
azetidine cation compound, and the macromolecular quaternary ammonium salt cation modifying agent is
polyamide polyamine epoxy chloropropane. The method disclosed by the invention adopts two kinds of specific modifying agents and has the function of the synergistic effect of the two agents, so that the salt-free low-alkaline
dyeing for the
cellulose fiber is realized in the subsequent
dyeing,
pollution is reduced, the cost is saved, the technology is simplified, the difficulty is reduced, and the modifying effect and the subsequent dyeing effect are good, so that the method is suitable for the industrial
mass production.