Interval sowing date experiment was executed with‘Tianlongyou 619’as testing material to explore the variation of yield and rice quality under different sowing dates. The results showed that the yield and its components were declined gradually with the delayed sowing dates of rice. Brown rice rate, polished rice rate, head milled rice rate, protein content, palatability quality were increased. At the same time chalkness rate and amylose content were reduced, the quality of rice was gradually improved. So, on the basis of the full heading time and certain yield, it is beneficial to improve the quality of rice with suitable delayed sowing date of‘Tianlongyou 619’.