The invention relates to a
cellulose fiber cationic modification method, belonging to the technical field of
textile dyeing. The
cellulose fiber modification process comprises the following steps: putting
cellulose fibers in a container, then adding water to the container, and then carrying out modification treatment on the cellulose fibers with two kinds of cationic modifiers, namely a low molecular
quaternary ammonium salt cationic modifier and a high molecular
quaternary ammonium salt cationic modifier, thereby obtaining
modified cellulose fibers after modification treatment is completed, wherein the low molecular
quaternary ammonium salt cationic modifier is an
epichlorohydrin parent derivative of
epoxy quaternary ammonium salt; the high molecular quaternary ammonium salt cationic modifier is cationic
starch. The
cellulose fiber cationic modification method has the beneficial technical effects that the two kinds of specific modifiers are adopted and the synergistic effects of the modifiers are given play to, so that the
modified cellulose fibers achieve salt-free low-alkali
dyeing in subsequent
dyeing, have the effects of reducing
pollution, saving the cost, simplifying the process and reducing the difficulty, have good modification and subsequent dyeing effects, and are suitable for large-scale industrial production.