Viscose fiber containing torreya grandis essential oil and preparation method of viscose fiber

The invention relates to a viscose fiber containing torreya grandis essential oil and a preparation method of the viscose fiber. The method comprises the following steps: a torreya grandis essential oil functional mother solution is dispersed into a viscose solution II before an extrusion process by adopting a viscose spinning process; the torreya grandis essential oil functional mother liquor is prepared from a torreya grandis essential oil emulsion and a viscose solution I by mixing; in the viscose solution II, the polymerization degree of cellulose II is 300-500; in the viscose solution I, the polymerization degree of cellulose I is 500-700; the prepared fiber comprises a cellulose fiber matrix and torreya grandis essential oil distributed in the fiber matrix; the mass fraction of the lost torreya grandis essential oil in the fiber in the fiber forming process is 30%-40%; and after 10 times of water washing, the elution rate of the torreya grandis essential oil in the viscose fiber containing the torreya g