Abstract: The pectin compound enzymes were produced by solid state fermentation using Aspergillus niger 102-ZL, and the wheat bran and rice straw powder were used as main material. The crude pectin compound enzymes liquid was obtained by extracting, and to be used in flax roving scouring. Taking the residual gum content and the strength of scouring flax roving as target, the five parameters (enzyme concentration, treating temperature, time, EDTA addition and pH) of flax roving scouring were optimized using single factor and orthogonal test. The results showed that the optimal enzyme concentration, treating temperature, time, EDTA addition and pH were 75μ/mL, 40℃, 4h, 6mmol/L and 5~5.5 respectively. Under the optimal condition, the residual gum content and the strength of scouring flax roving were 15.80% and 975CN respectively, and the flax roving could meet the requirements of spinning process.