Abstract: US Standard Atmospheric Model is often used to solve the aerosol extinction coefficient with echo data obtained by Raman lidar, but it may include big errors in results. A new method, which uses the temperature mode to solving the atmospheric aerosol extinction coefficient in troposphere, is presented. It was theoretically derived. It′s found that the result acquired by the new method agrees with that obtained by a radiosonde. Theory study and experiment result show that the temperature mode is feasible in solving the aerosol extinction coefficient in troposphere by Raman lidar in ordinary circumstances. The temperature mode is more suitable for the actual situation than US Standard Atmospheric Model, and can reduce the error of the inversion result since it includes the season and geographical elevation factors.