In order to improve the technique system of high-yield cultivation in coastal region, different varieties were used to determine the effects on the growth and yield of wet direct-seeding rice and explore the best sowing date in coastal region by setting different sowing date in 2017 and 2018 under random regional tests. The results showed that the actual yield of A₂ and B₂ were higher in May 10th and 12th, which were 8.25, 8.34 t/ha, respectively.And these yield were 14.86%, 15.42% lower than that of mechanized transplanting, but the benefits increased by 801 and 553 yuan/ha, respectively.