The invention relates to the technical field of
dyeing pretreatment of
textile fabrics, and discloses a pretreatment process of a
viscose, cotton and
acrylic fiber blended knitted fabric, which comprises the following steps: padding the
viscose, cotton and
acrylic fiber blended knitted fabric in a pretreatment solution through a cold-batch device with the liquid carrying rate of 100wt%-110wt%, then rolling, and piling at 28 DEG C for 18-36 hours; the pretreatment liquid contains H2O2, NaOH, a cold
scouring agent CPB and a refining emulsifier, the concentration of the H2O2 is 40-60 g / L, the concentration of the NaOH is 40-60 g / L, the concentration of the cold
scouring agent CPB is 15-30 g / L, and the concentration of the refining emulsifier is 2-6 g / L; according to the pretreatment process, the
viscose, cotton and
acrylic fiber blended knitted fabric is padded in a cold-batch pretreatment solution composed of H2O2, NaOH, a cold
scouring agent CPB and a scouring emulsifier through a cold-batch device, the fabric is stacked at 28 DEG C for 18-36 h under the synergistic effect of the scouring emulsifier and the cold scouring agent CPB, the whiteness of the fabric can be improved, and meanwhile cotton seed
hull impurities are efficiently removed; meanwhile, the invention further discloses the viscose, cotton and acrylic
fiber blended knitted fabric obtained through the pretreatment process.