The invention provides a preparation method of jute viscose. The method comprises the following steps of: infusing, pressing and grinding jute pulp to obtain alkali cellulose, wherein the average degree of polymerization of the jute pulp ranges from 400 to 450; yellowing, dissolving and filtering the alkali cellulose to obtain spinning glue liquor; and spinning the spinning glue liquor to obtain jute viscose. The invention does not need to adjust the degree of polymerization and omits the ageing procedure by directly using the jute pulp with lower average degree of polymerization as the material to prepare the jute viscose. The invention avoids sharp rupture of cellulose molecular chain and reduces the influence on the fibre intensity as the ageing procedure is not needed. A test proves that the dry fracture strength of the jute viscose prepared by the method is not less than 2.30cN/dtex, the wet fracture strength is not less than 1.30cN/dtex, the dry rupture elongation rate is not less than 18% and the flaw is not more than 5mg/100g.