Injection-seeded all-solid-state single-frequency pulse lasers (SFPLs) with narrow linewidth, long coherent length, and high power are desirable laser sources applied in fields such as Doppler wind lidar, gravitational wave detection, and laser spectroscopy. They have wide applications in military and civil fields. The research advancement of the injection-seeded all-solid-state SFPLs and the corresponding techniques are reviewed around injection seeding techniques and cavity length controlling techniques. The prospects of them are discussed.