高能储存环中的正电子束流辐射出光子 ,打在束流管道壁上产生光电子并形成电子云 ;多束团正电子束流与电子云相互作用 ,有可能发生的不稳定性 ,称为束流光电子不稳定性 .这种不稳定性有可能在下一代高能正负电子对撞机的束流中发生 ,因此对这种束流不稳定性的研究 ,也有很重要的实际意义 .文章讨论了在北京正负电子对撞机 (BEPC)上开展的束流光电子不稳定性实验和模拟分析研究 The positron beam in the high-energy storage ring radiates photons and impinges on the wall of the beam tube to generate photoelectrons and form an electron cloud. The multi-bunch positron beam interacts with the electron cloud and may cause instability, which is called Beam photoelectron instability, which is likely to occur in the beam of the next generation of high-energy positron-electron colliders, is also of great practical importance for the study of this beam instability. The experimental and simulation studies of beam photoelectron instability at the Beijing Electron Positron Collider (BEPC) are discussed