Abstract: Using echo intensity of Doppler radar composite elevation data from 2003 to 2010 in Zhaotong and 10 counties weather station rainfall data,multi-elevation echo intensity data as predictors to forecast the next 1 hour precipitation,combined with the small regional climate background ,a variety of tests of sub-station,sub-distance,point elevation were conduct,a better equation for 1-hour rainfall estimates selected.was Predictors were extracted according to point poly figures.The total rainfall extrapolation forecast were done by combining with automatic station rainfall data.Based on these,a forecast system was established,which has a certain reference value in the short-term and nowcasting actual operations.