The atmospheric transmission property of 1.06 μm laser is analyzed by using the Modtran model,and some valuable conclusions and inferences are presented.The effects of atmospheric molecules,aerosol,fog,rain,visibility and different path are considered.It is pointed out that,in the course of the atmospheric transmission of 1.06 μm laser,the impact of molecules can be neglected.The effect of aerosol is more obvious and the transmission is reducing with the decrease of visibility especially when the visibility is less than 10 km.At the same time,the 1.06 μm laser can hardly pass through the atmosphere when it is fogy or heavily raining day.The conclusions above have positive significance when the laser-guided weapons are developed,experimented and used in the war.