Abstract: The effect of rice varieties cultivated in Heilongjiang province on quality of early ripening japanica rice was studied through contrast test and statistic analysis. The purpose of this study is to supply with theoretical base and technique support on screening high quality rice varieties and high yield cultivation technique. The major result is as follows.（1）In the three milling quality of different ripening varieties, the mean value of brown rice was 83.1%、82.9%、83.1% and 83.0% respectively, the mean value of milled rice was 71.9%、71.9%、72.0% and 73.0% respectively. The brown rice of different ripening varieties had a little difference, however, the milled rice of late ripening rice varieties was a little higher than that of other varieties. The average value of head yield was 61.7%、61.7%、66.5% and 67.2% respectively among different ripening varieties. The head yield of late ripening rice varieties was high than other varieties. The cv of milled rice of late ripening rice varieties was 1.2% lower than that of other varieties. It suggested that milled rice was different among varieties. The positive relationship（0.0566） between chalk rice rate and gel consistency was found and the chalk rice rate was negatively related with milled rice（-0.4827）. Therefore, lower chalk rice rate germplasm resource is important to rice breading. （2）The amylose content is an important index which affect rice taste quality. The results showed that the amylose content was between 16.67% to 22.40%, the average value was 18.8%. The difference among varieties was great. The amylose content was significantly negatively related with protain content (-0.8207).