Micro pulse lidar(MPL) is an effective tool for detecting atmospheric aerosol and cloud. To find out the situation in urban subaerial range, the horizontal distribution of atmospheric aerosol and pollutant is presented with MPL developed by us. Two methods, subsection slope approach and Fernald method, are used to reverse atmospheric aerosol and pollutant horizontal extinction coefficient distribution. Results show that it is feasible to calculate horizontal data of MPL by subsection slope approach and Fernald method.