超短超强脉冲激光是目前世界上在实验室内产生超高能量密度、超强电磁场和超快时间尺度的综合性极端物理条件的重要手段。在对超短超强脉冲激光发展现状和趋势分析的基础上，针对高能量密度物理等前沿基础科学实验研究多样化的需求，提出研制不同脉冲宽度、三种脉冲激光（两束输出功率为10 PW的飞秒激光、单束输出功率为1 PW@1 Hz的飞秒激光、单束千焦耳皮秒激光和单束万焦耳纳秒激光）协同输出至4个物理实验站形成不同工作模式，实现多种加载-诊断物理实验功能的星光超强激光装置（XG-ELF）的设想。对XG-ELF装置的物理实验设想和主要设计结果进行介绍。建成后的XG-ELF装置将为我国高能量密度物理前沿基础领域中的研究提供先进的研究平台。

The ultrashort and ultra-intense pulsed laser is an important means of producing comprehensive extreme physical conditions with ultra-high energy density, ultra-strong electromagnetic fields, and ultra-fast time scale in the laboratory. The development status of ultrashort and ultra-intense pulsed lasers, the development trend of ultrashort and ultra-intense pulsed lasers, and the diverse needs of scientific experimental research on high-energy-density physics are analyzed. On this basis, the scheme of the XingGuang-extreme laser facility (XG-ELF) with multiple loading-diagnostic physical experimental functions is proposed, which is composed of three kinds of pulsed lasers with different pulse widths (i.e., two femtosecond lasers of 10 PW, a femtosecond laser of 1 PW@1 Hz, a picosecond laser of 1 kJ, and a nanosecond laser of 10 kJ) that collaboratively output to four physical experiment stations. Moreover, the assumptions and main design results of the physical experiments on XG-ELF are introduced. The completed XG-ELF will provide an advanced experimental platform for research on the frontiers and basic fields of high-energy-density physics in China.