The invention discloses a 
chlorine-free and shrink-proof finishing technology of 
wool tops. The 
chlorine-free and shrink-proof finishing technology comprises the following steps: 1) washing with water: carrying out water-washing pre-treatment on the 
wool tops to remove impurities in the 
wool tops; 2) carrying out biological 
enzyme shrink-proof treatment: immersing the wool tops subjected to the water-washing treatment into a biological 
enzyme shrink-proof treatment solution; carrying out padding treatment, wherein the biological 
enzyme shrink-proof treatment solution is prepared from the following components in percentage by 
mass: 1 percent to 3 percent of 
hydrogen peroxide, 2 percent to 5 percent of 
sodium hydrogen sulfite, 15 percent to 20 percent of compound 
proteinase B, 35 percent to 40 percent of organic 
silicone resin, 7 percent to 10 percent of a penetrating agent and 29 percent to 33 percent of 
acrylic resin; 3) 
drying: 
drying the wool tops subjected to the biological enzyme shrink-proof treatment to obtain a wool top finished product with shrink-proof and anti-pilling performance. By adopting the manner, a technological flow is shortened so that the treated wool tops reach 
machine-washable shrink-proof effect of traditional chlorination and the anti-pilling performance is improved; in a finishing process, AOX (Absorbable Organic 
Halogen) 
pollution is not generated, and energy saving and environmental friendliness are realized.