Rice is the staple food for over two-thirds of China's population. The rice bacterial blight caused by the infection of Xanthomonas oryzae pv. oryae has been worsening year by year in China. With the continuous promotion of simplified cultivation techniques and new varieties, coupled with the virulence variability of the pathogenic bacteria, posing new challenges to its efficient control. In order to clarify the occurrence patterns of rice bacterial leaf blight under different sowing dates and to better prevent and control the disease, this experiment took the occurrence characteristics of bacterial leaf blight in different rice varieties under different sowing dates as the starting point, exploring the disease index, yield formation, and yield loss patterns. The results indicated that the later sowing date of Yongyou 1540, the higher the disease index, and the earlier the sowing date of Jiafengyou 2, the higher the disease index. This presents a characteristic of rice sowing date having a greater impact on the disease index of white leaf blight than rice varieties. Comparing the yield loss rates of different varieties under different sowing dates, it can be found that the yield loss of Yongyou 31 is less affected by the sowing dates, indicating that it is also less affected by sowing date adjustments and bacterial leaf blight, and has greater sowing date elasticity.