Based on the operational TRAMS (Tropical Region Assimilation Model for the South China Sea) 2.0 version model, a series of technical updates were conducted, including model resolution, dynamical frame, and physical process, thus TRAMS 3.0 version model has been formed. Verifications of the typhoons in 2017 showed that track errors and intensity errors were reduced significantly, the 72 h mean track error was decreased by 7% (about 13.6 km), and the intensity was decreased by 10.5% (about 1.2 hPa). The meteorological elements were also improved by the newly TRAMS 3.0 model. Increasement of model resolution and revised cumulus scheme provided major contribution to forecast improvement in TRAMS 3.0 version.