Traditional solid state solid state lasers are large,heavy,and have high power consumption,limiting their use in space constrained equipment.Diode pumped Passively Q Switched solid state laser eliminate the need for complex temperature control devices,have a simple Q tuning mechanism,and are able to meet the requirements of miniaturization and low power consumption for special application scenarios in complex temperature environment.An approach is proposed to realize a 1.06μmlaser pulse output based on dual wavelength LD pumping with a wide temperature range and temperature free threshold adaption.The corner cube resonator is designed based on Nd∶YAG crystal,and the effect of the the face center distance from LD to laser rod on the thermal load is analyzed through the numerical analysis,and the optimal face centre distance of 4mm is determined.The variation of laser static energy output in the temperature range of -40℃ to 60℃ with the same pump power,and influences of saturable absorber with different initial transmittance on threshold pulse width are analyzed through numerical simulation.Result shows that threshold pulse width under 200 μs in the temperature range from -37℃ to 60℃,the lowest point reached 29.4 μs.A threshold adaptive adjustment module is constructed with laser pulse real time detection,and then the experiment setup is established.The experimental results show that the threshold pulse width varies from 40 μs to 180 μs in the temperature range of -35℃ to 60℃.Engineering application is realized through adopting the integrated molding process of laser cavity and the lightweight aluminum,the volume is 83.5mm×44mm×29.5mm and the weight is about 230 g.Single pulse output energy of 42 mJ is achieved under the condition of a saturated absorber with an initial transmittance of 23.8%,with a pulse width of 5.2 ns.