For miniaturization, light weight and high efficiency of the diode pumped all-solid-state laser (DPSSL), a new method is studied with laser diodes (LD) operating at high temperature (808 nm, 55 ℃) as the pumping source. The refrigeration press of the temperature control system is reduced, and the bulk, weight and power of the conductive cooling structure are optimized. The relationship between the cooling power of thermoelectric cooler used in DPSSL and the operation temperature of LD is studied. A highly reliable, miniaturized light-weight DPSSL is designed by using the pump source of high temperature LD array and the corner cube prism resonator. An engineering laser prototype is developed with parameters as follows: repetition rate 50 Hz, continuous operation time 6 min, pulse energy 85.7 mJ, pulse width 10.8 ns, divergence angle 2.8 mrad, electro-optic efficiency 4.3%, volume 170 mm×62 mm×80 mm, and weight 1.1 kg. The results show that the high temperature LD pumped all-solid-state laser is an effective way to realize small, light-weight highly effective DPSSL.