Free space laser communication technology has been a research hotspot in the field of satecom and payload technology for a long time， with characteristics such as large band width and high speed. High earth orbit relay satellites are the backbone nodes of data transmission between satellites. With the maturity of laser communication technology， laser communication link has become a reliable technical means for data transmission of high earth orbit relay satellites at home and abroad. This paper introduces the latest development trends of high earth orbit satellite laser relay links at home and abroad and its future development plans， which provides a reference for the construction of space laser information networks in China.