The relation between stellar chromospheric activity and rotation of evolution stars have a good relativity . but meticulous analysis show chromospheric activity of evolution stars depend on stellar spectral type and effective temperature strongly . we provide several possible explain for those phenomena 但是细致分析显示演化恒星色球活动水平随恒星自转周期间的分布对恒星光谱型和恒星表面有效温度有很强的依赖，并对这些现象提出了几种可能的解释。
