The utility model discloses a fiber fixing clamping tool comprising two identical and mutually cooperated fiber fixing pieces; the fiber fixing piece comprises a fixed portion, and a first clamp portion and a second clamp portion with same dimensions and connected with the fixed portion; the fixed portion is used for fixing the fiber fixing pieces; a groove is arranged between the first clamp portion and the second clamp portion, and a width of the groove is matched with that of the first clamp portion; and when the two fiber fixing pieces are cooperated, the first clamp portion/ the second clamp portion of one fiber fixing piece is embedded in the groove of the other fiber fixing piece, and then a fiber fixing groove is formed among the clamp portions of the two fiber fixing pieces after embedment. The fiber fixing clamping tool is simple in structure, firm in clamping and easy to dismount, will not damage the fibers, is suitable for fixing fibers with different specifications, sizes, shapes and materials, and is suitable for fibers under different environments.