In order to investigate the relationship between subtropical jet activity and heavy dust in southwestern Iran, data from stations in the region over a 16-year period were used from 16 synoptic stations. After extracting the dusty periods, a spatial dust pattern was prepared using AOD data from Modis sensor. For analysis of atmospheric conditions, parallel and meridional wind components were obtained by referring to the National Center for Environmental Prediction / Atmospheric Science (NCEP / NCAR). The results showed that two models of subtropical winds are active in the production of dust in the region. In general, two winter and summer patterns can be named. Features of the winter pattern of jet placement with a southwest-northeast direction from northeastern Africa to northeast of Iran and summer jet with placement above 35 degrees latitude and its orbital expansion can be mentioned. The highest correlation was between wind speed of 200 hPa and inverse correlation was observed between the relative altitude of the level and dust in the region. The main feature of summer jets is the descent of air and increase of dust and winter jets are the ascent of air and increase of dust in the region. Finally, it was found that summer jets have more power in producing dust in the region. The results showed that based on the placement of the subtropical jet on the area, which was proved according to Palman and Newton theory, convergence and dust flow by the jet occurs in the area.