Beijing outfield experiments have been conducted with a new planetary boundary layer (PBL) aerosol monitoring lidar in the summer. The relations of black carbon mass concentration and near ground wind speed to aerosol extinction coefficient are analyzed, and the space-time distributions of aerosol extinction coefficient are also presented in this paper. The results indicate that: the correlations of black carbon mass concentration and near ground wind speed to aerosol extinction coefficient are good; the near ground weather conditions can affect the space-time diffusion and distribution of aerosol; the aerosol pollution during wee hours and morning is serious than in the afternoon and late at night. The results can be referenced for environment management.