Irradiation modification device and modification method for acrylic yarn fibers

The invention discloses an irradiation modification device and method for acrylic yarn fibers, and particularly relates to the technical field of irradiation modification, the irradiation modification device comprises an irradiation machine, the irradiation machine is provided with a modification chamber, the modification chamber is composed of two symmetrically-arranged box bodies, and half cavities are formed in the sides, close to each other, in the two box bodies. The multiple groups of yarn bodies jointly penetrate through the modification space through the multiple conveying stations, tension control over the yarn bodies can be completed in the modification space through the positioning assembly, and when yarn breaking and yarn changing occur in the irradiation process, the positioning assembly is pushed to move through the trigger assembly to complete clamping of the yarn bodies, so that the yarn bodies are effectively modified. Meanwhile, the triggering assembly winds the yarn body on the positioning