By analyzing the relation of annual rice output and the average soil temperature at 5cm level from June to September in Dunhua city,Jilin Province ,the technique of the soil temperature index was presented according to different time and growth stages of rice.By regulating soil temperature at 5cm level,the highly efficient production according to the four year test from 1986 to 1990 was obtained.A regulating technique of the soil temperature for steady rice output increase in a cold climate was suggested.