Abstract: In this paper two kinds of polymer optical fiber (abbreviate POF) were stretched with different elongation at different temperature to investigate the effects of axial tension on the side-glowing properties of POF. Luminance colorimeter BM-5A was used to measure the side-glowing luminance of POF after stretching, and the surface morphology of POF was tested by SEM. The results showed that light emitting fabric with good brightness and uniformity could be prepared by virtue of the extension during weaving process.