The present invention relates to an endurable decoration light string of light strings and one or more non-electrical connector. The light string includes mutually connective luminaries and electrical connector, in which the luminaries are composed of luminescent elements including lamp bulb, tungsten lamp, LED and lamp holder. Electrical conductor can be single or multiple wires, and uses the non-electrical connector parallel or by winding to fix on the predetermined fixed position of the head and tail ends and center part of the decoration light string, to tie a knot on the predetermined fixed position to enhance endurable strengthen of decoration light string. Thus, during the arrangement, the draw force of the decoration light string will be firstly supported by non-electrical connector to avoid the damage on the decoration light string and increase the life span on the decoration light string.