Abstract: The orthogonal experiment of sowing date, planting density, nitrogen application rate and water content of conventional late rice Changnongjing No.1 was carried out to explore the combination of different cultivation factors. The effects of conventional late rice growth period, major economic traits and yield were studied. The results showed that the sowing date had a significant effect on the whole growth period of rice, while the transplanting density and nitrogen application rate did not reach a significant level. Within the experimental level, with the delay of the sowing date, the growth period is gradually shortened, and the effects of nitrogen application rate, water, and planting density on the growth period have not reached a significant level. Sowing date and nitrogen application rate have significant effects on the yield of tested rice. Factor, the impact on yield reached a significant level, and the effects of transplant density and moisture were small. The best combination of high-yield cultivation of Changnongjing No.1 was A₂（date of seeding May 16）B₂（600 000.0 basic seedlings per hm²） C₃ [nitrogen application rate 360 kg/hm²] D₁ （water layer 0 cm）.

Key words: conventional late rice, sowing date, nitrogen application rate, application amount of water, yield