Abstract: This paper is based on the operational limited area prediction model run in National Meteorological Center. The horizontal resolution was increased from 1°×1° to 0.5°×0.5° grid in latitude and longitude. The vertical layer was increased from 15 to 20, and the explicit precipitation scheme was introduced into the model physical processes. Using the improved model, a case of forecast experiment on heavy rainfall caused by a landing typhoon in August, 1997 was made, and the results are reasonable.