Grain harvest quality investigation and grain quality forecast is an important basic work to serve the grain purchase and the agriculture, countryside and farmers. The quality of the Japonica rice harvested in Jiangsu province in 2013 was introduced. The survey data showed that the average brown rice rate was 81.5%，which was 0.3% higher than that in 2012, the head rice rate was 67.6%, improved by 2.9%，imperfect grain was 3.1% ,which declined compared to last year. In the province, the overall quality was better than last year, the North was better than the South; the standard-reaching rate of high quality varieties increased.