The information of the heavy rainfall and mountain torrent in Zhangjiajie,8—10 July 2003,such as the main influential system,the physical diagnosis field data,the data of Doppler radar echo and automatic weather stations,is analyzed. The primary emphasis is especially put on the favorable effect of special terrain and more night heavy rainfall in Zhangjiajie. It provides some helpful instructions for the forecast of rainfall and mountain torrent in the northwest of Hunan Province.