The trend of total ozone column amount in China from 2005 to 2020 is studied with OMI daily Level-3 ozone column data products. By constructing the relevant database, the correlation between Chinarimes regional total ozone column density and latitude and longitude is analyzed based on data searching and data mining methods. The results show that the total ozone column amount over China increases with the increase of latitude from 2005 to 2020, and its relationship with longitude is affected by latitude. When the latitude is greater than a certain threshold, the total ozone column amount increases with the increase of longitude, and when the latitude is less than this value, the total ozone column amount basically remains stable from West China to East China. The results are of great significance to reveal the variation of total ozone column amount in China and to further analyze the change trend of global ozone.