A field experiment was conducted to study the effects of sowing dates on grain yield and radiation use efficiency of direct-seeded hybrid rice with different maturity stage at all-time logged-water paddy field in 2019, the early maturity hybrid rice Chuanzuoyou 8727, medium maturity hybrid rice Fuyou 838 and late maturity hybrid rice Nei 6 you 107 as materials. This experiment set up five sowing dates which are March 15th, March 20th, March 25th, March 30th and Apirl 4th. The results showed that, there were significantly differences in grain yield and radiation use efficiency of Chuanzuoyou 8727 and Nei 6 you 107 among five sowing dates, while the difference in grain yield and radiation use efficiency of Fuyou 838 among five sowing dates was relative small. The grain yield and radiation use efficiency of Chuanzuoyou 8727 were increased with the delay of sowing dates, and sowing on Apirl 4th recorded the highest grain yield and radiation use efficiency. The high grain yield was associated with the high panicle number per m², spikelets per panicle, dry matter weight and harvest index. The grain yield and radiation use efficiency of Fuyou 838 and Nei 6 you 107 showed the trend firstly increased and then decreased with the sowing dates delayed, and sowing on March 20th recorded the highest grain yield and radiation use efficiency, its yield increase advantage is mainly reflected in the number of grains per panicle, seed setting rate, dry matter weight and harvest index. Compared with Chuanzuoyou 8727, the grain yield of Fuyou 838 and Nei 6 you 107 were increased by 14.6% and 33.0%, respectively, and the radiation use efficiency were increased by 9.0% and 20.5%, respectively. The results suggested that the suitable sowing date for early maturity hybrid rice cultivar was on Apirl 4th, and for medium and late maturity hybrid rice cultivar was on March 20th at all-time logged-water paddy field in southeast of Sichuan province.