The package technique of high duty cycle, high power linear array diode laser is studied and the measured results of the laser performance are presented. Over 40W peak power output at duty cycles up to 20%(200m s，1000Hz) is achieved. At 100Hz to 1000Hz repeat frequency, the center wavelength is 805 ~ 808ns with corresponding spectral width of 3.1 ~ 4.2nm. The instability of the output laser is less than 1%.