Atmosphere turbulence with an atmospheric simulator in our lab is simulated,the intensity of which can be controlled by adjusting the temperature difference of up and low boards. At the same time,we burn coal and cigarettes in the simulator to simulate PM2.5,and measure its concentration with a laser sensor. For atmospheric visibility is principally influenced by PM2.5,We acquire the air quality data of a certain area in Beijing within a period of time to fit the relation of the two variables and we get the regression model at last. We apply this regression model to our simulator,and calculate the visibility of the simulative atmosphere,comparing it with the air quality data of Fengtai,Beijing to test the reliability of our simulator . It shows that our atmospheric simulator simulates not only the turbulence,but also PM2.5,with feasible method and sufficient theoretical foundation.That provides an indoor experimental platform for researching laser atmosphere transmission.