Dyeing technique for dyeing processing yarn of activated dye for silk plied yarn

The invention discloses a dyeing technique for a dyeing processing yarn of an activated dye for a silk plied yarn. The dyeing technique is characterized by comprising the following steps: injecting water and increasing temperature; adding a refining agent; pressurizing and increasing temperature; continuously refining; reducing pressure and draining liquid; washing; dyeing. According to the technical scheme provided by the invention, the degree of dyeing is above 95%, the color fastness reaches above level-4 and dark color can be dyed; the dyeing period is 30% less than the dyeing period of room temperature skein dyeing; the collecting volume of the dyed products is increased for above 5 times, so that the dyeing efficiency is greatly increased, the bath ratio is 1/2 of the original bath ratio, the water usage is reduced and the tail liquid discharge is reduced; a special processing technique is adopted by the invention, so that the speed and efficiency of removing sericin covered on the center of the silk pl