The invention discloses a manufacturing method for boiling and sizing copper ammonia fiber/bamboo fiber anti-bacterial blended fabric. Selected warp and weft materials are as follows in parts by mass: 35-40 parts of copper ammonia fiber, 40-90 parts of viscose fiber, 20-25 parts of cocoon fiber, 8-15 parts of bamboo fiber, 30-45 parts of cotton fiber and 8-18 parts of super fine denier polyester, wherein warp threads adopt a ratio of 92/2, and weft threads adopt a ratio of 48/1. A scutching procedure comprises a rough cleaning step and a fine cleaning step, wherein in the rough cleaning step, a bath ratio is 1:(30-50), neutral detergent is added, the dosage of the neutral detergent is 4-5g/L, the water temperature is 55-65 DEG C, and the washing time is 0.5-0.8 hour; in the fine cleaning step, the bath ratio is 1:(11-15), finishing agent solution of which the mass concentration is 26%-32% is added, the adding quantity of the finishing agent solution is 6-9g/L per litre water, the treatment time is 0.5-0.8 hour, and the fine cleaning temperature is 66-72 DEG C. According to the manufacturing method disclosed by the invention, the anti-bacterial performance of the copper ammonia fiber cannot be damaged, the comfort is better, meanwhile, the problems that a fiber molecule is loose in structure, large in moisture absorption and easy to deform and stretch can be effectively solved, and the problems of warp exposing, weft exposing and weak spots on fiber fabric can be prevented from happening.