A high-repetition-rate single-longitudinal -mode laser with a narrow pulse width and a high pulse energy is promising for applications in the fields of fast ignition lasing radiation^[1^], space debris detection^[2^], LIDAR Thomson scattering diagnosis^[3^], etc. Stimulated Brillouin scattering (SBS) is a simple and efficient pulse-compression technology^[4^–7^] that can compress long nanosecond pulses with a high energy to sub-nanosecond pulses. By combining SBS technology and main oscillation power amplification technology, a pulse laser with the four parameters of high repetition rate, high energy, sub-nanosecond pulses and high efficiency can be achieved^[8^–12^].