The invention belongs to the technical field of manufacture of stock solution coloring acrylic fibers and particularly provides stock solution coloring acrylic fibers having the high color fastness and a preparation method. According to the preparation method, a coupling agent and an acrylic fiber spinning stock solution are adopted and are matched with a dispersing agent to treat a dye, prepared color paste has good dispersing stability, the dispersed and modified color paste is added into the spinning stock solution, the pigment contained in the produced colored fibers and the fibers produce a stronger binding force, and the produced colored fibers have higher abrasion-resisting fastness and color fastness to washing and are wider in using field.