Abstract: In this paper, effects of different varieties, transplanting standard and K application on yield of post-tobacco rice were studied by orthogonal design L₉ (3⁴). The results showed that, in moderate-fertility soil, “Tianyou 3301” could be selected with transplanting density of 33.3 cm×20.0 cm and 5 kg K₂O per 667 m² for acquiring high efficiency and high yield.