Atmospheric sulfur dioxide (SO₂) is a major air pollutant and has the most negative effect on atmospheric chemistry. In this study, measurements of SO₂ column concentration obtained from an ozone monitoring instrument (OMI) are used to investigate the temporal and spatial dynamics of SO₂. Temporal and spatial distributions of SO₂ concentrations obtained from OMI over the Beijing-Tianjin-Hebei (Jing-Jin-Ji) region from 2007 to 2016 are presented, and annual changes and trends in the seasonal cycle are shown. The annual variations of SO2 concentration are found to have decreased 47.6% from 2007 to 2016, and the SO₂ concentration shows a high correlation with SO₂ emissions. SO₂ shows significant cyclical seasonal characteristics over Jing-Jin-Ji, with maximum values in winter and minimum in summer; both temperature and precipitation are negatively correlated with SO₂ concentrations in seasonal variations. In addition, the spatial distribution is unbalanced, and Shijiazhuang-Xingtai-Handan is found to be in highly polluted areas, which may be related to energy consumption. The overall trends in the average annual value of SO₂ in the 13 sites appear to have decreased since 2007, and SO₂ concentrations in the Shijiazhuang-Xingtai-Handan region decreased by 55% during the past decade, so the Chinese government has made great efforts in pollution reduction, and has achieved remarkable results.