Multipoint field experiment was conducted to study the effect of application of new type of silicon fertilizer on twoline hybrid rice yield in Jianghuai area.The result showed that silicon fertilizer application significantly improved the rice yield,optimized the structure of yield and raised the desease resistance.The yield increased from 2.76% to 7.84% when the amount of silicon fertilizer applied increased from 3 000 g/hm2 to 12 000 g/hm2.The yield and seed setting rate significantly increased by 6.2% and 3.2%,respectively.The percentage of earringtillers was 67.3% and significantly higher than that of control.The main pest and diseases of rice such as blast disease,rice false smut,banded sclerotial blight and rice stem borer decreased significantly after applying silicon fertilizer.The length of 1th~4th internode of rice shortened by 0.15~0.85 cm.The basal stem wall of 2nd and 3rd internode thickened.So the lodging resistance of twoline hybrid rice was improved.