The invention discloses a preparation method for acrylic fibers/regeneration, silkworm bamboo fiber blended washable fabrics. The selected warp and weft material comprises, by weight, 40-90 parts of acrylic fiber, 20-45 parts of natural fiber, 6-12 parts of synthetic fiber, 60-95 parts of cotton fiber, 8-18 parts of super fine denier polyester, 50-90 parts of regenerated bamboo fiber, 11-20 parts of mulberry fiber, 1-8 parts of corn protein fiber, 5-8 parts of fine staple cotton fiber and 5-10 parts of villus fiber, wherein washable treatment and water-repellency treatment are sequentially between the slashing operation and air injection operation. The washable treatment is: dipping the fabrics in the composite rare earth finishing agent for 45-60 minutes and finishing the dipped fabrics with complex enzyme after drying. Through the reasonable proportion of the composite rare earth finishing agent, the preparation method for the acrylic fibers/regeneration , silkworm bamboo fiber blended washable fabrics can improve the washing strength of the regenerated bamboo fiber, solves the problem that the regenerated bamboo fiber blended fabrics is not washable, and improves the wear-resisting property of the bamboo fiber blended fabrics.