Representation and uses of jones vector of polarized light and polarized elements are studied . the results show that jones vector is very useful if analyzing polarized property of polarized light 摘要研究了偏振光和偏振元件的琼斯矢量表示方法,以及琼斯矢量的应用,结果表明,琼斯矢量对分析偏振光偏振态的变化十分有效。