A laser diode-pumped Nd∶YAG disk laser with an average output power of 1.32 kW is reported in this paper.A nearly uniform pump profile is achieved with a good design of the four-pass optical coupling system.An average output power of 1.32 kW is obtained form two square Nd∶YAG disks in a stable resonator.The optical efficiency of the laser system is about 32.1%.Using the method of interferogram,the distortion of gain medium is measured and it is less than 10 λ.