Abstract: Abstract:【Objective】Studied the influence of different time and different cycles of wetting and drying on seed germinating percentage of rice,the study aimed to provide the references on improving?the?germination?rate?of?rice seeds.【Method】With the ‘Xiushui 134’ as test material ,explored the effect of seed soaking treatment with different time（48h、60h and 72h） and different cycles of wetting and dry (0 cycle、1 cycle and 2cycles)on seed germinating percentage of rice Xiushui 134 .【Result】Through the influence effect of experimental factor on germination percentage, the influence effect of different cycles of wetting and drying was always greater than different time. In the environment of 17.5℃, the germination percentage of treatment 3 which soaked with two cycles of wetting and drying was significantly higher than the germination percentage of treatment 1 which soaked with 0 cycles of wetting and drying and the germination percentage of treatment 2 which soaked with one cycle of wetting and drying.The germination percentage of treatment C which soaked with 72 hours was significantly higher than the germination percentage of treatment A which soaked with 48 hours and the germination percentage of treatment B which soaked with 60 hours.【Conclusion】Soaking the seeds for 72h and two cycles of wetting and dry could promote the germination rate，and had significant inhibiting effect on seed germination in Chongming.