In order to investigate the tropospheric aerosol optical properties over Hefei, a combined Raman elastic-backscatter lidar was developed for vertical profiling aerosol extinction, backscatter and lidar ratio. The lidar and data processing were introduced, and some measurements were presented. The temporal and vertical variations of the aerosol backscatter coefficient in the troposphere were observed using the lidar during the passage of the cold front, an amount of particles could be taken to Hefei with the cold air mass, the vertical distribution of the aerosol in the lower troposphere varied extremely, and the height of the top of mixing layer could be lifted up to about 3 km above ground level. The comparisons between aerosol optical properties retrieved using Fernald method and Raman method showed that extinction, backscatter and lidar ratio profiles in the lifted aerosol layer cloud be measured using the lidar.