A new pumping structure about laser diode (LD) side-pumped NdYAG Q-switched laser without water cooling was reserched. Side-pumping was done with three LD centimeter strips made by 12 cm bar. NdYAG crystal rods were smoothly fitted to copper stucking net with cooling units, which mounted on the heat sink copper ring. And copper ring was processed into the aluminum heat sink ring sets with outer surface of the triangle stack slot. Three long rectangular array laser diodes according to their specific design were fixed to the heat sink in order to ensure working at constant temperature without water cooling. Experiencing at the range of -20 ℃ and 40 ℃, the low-order mode laser output of 9 ns pulse width and maximum 98 mJ in 1064 nm is obtained and output energy and stability at -20 ℃ was higher than that at 40 ℃. This design can reduce the laser volume and increase the system efficiency at last.