Abstract: In order to promote the popularization and application of new fragrant rice variety, this paper briefly introduced the breeding process, characteristics, yield performance and supporting cultivation technology of new fragrant rice variety Longdao 203. Longdao 203 is a new fragrant rice variety bred by using pedigree method with female parent Wuyou rice 4 and male parent Suigeng 4. It was approved by Heilongjiang Crop Variety Approval Committee on July 15^th, 2020, and the variety approval number is Heishendao 20200053.Longdao 203 obtained the application number for the protection right of new plant varieties（20191006401） in 2019 and the announcement number for the protection of new plant varieties in 2020 is CNA030964 E.The average yield of regional test was 8 000.7 kg·ha^-1, which was 6.7% higher than that of the control variety; The average yield of production test was 7 780.7 kg·ha^-1,which was 8.0% higher than that of the control variety.In the adaptive area, the number of growth days from emergence to maturity is about 140 days, and the active accumulated temperature ≥10 ℃ is about 2 700 ℃.In many years of production appraisal tests, it has shown good high yield, high rice quality, lodging resistance and other characteristics.