This invention discloses a kind of technology to handle the cashmere yarn, especially the fulling technology of hand-knitting cashmere yarn, it includes the following steps in proper order: washing treatment of the hand-knitting cashmere yarn , clean treatment, the light fulling treatment, soft treatment, dehydration treatment, drying, dampening treatment, since the fulling treatment of the cashmere yarn is dyed by the now available color dye equipment under rational sticky condition, it has the merits that it is easy to operate, it is easy to control, the production cost is low, the handle cashmere yarn is soft and smooth , has the body bone , elastic, the surface shows a layer of short cashmere, the outward appearance is fine , the handle is thick and soft, the color and the lustre is gentle.