In order to improve the ability of convenient and precise production and management of rice fertilization and realize the visualized quantitative fertilization integrated with real-time monitoring and decision-making, this paper studies the nitrogen nutrition diagnosis model, critical diagnosis vegetation index value and quantitative topdressing model of rice growth period such as tillering period, jointing period and heading period with a variety of typical vegetation indexes by using the remote sensing image data of gaofen-1 satellite And the visualization expression of nitrogen nutrition diagnosis and quantitative fertilization recommendation was realized. The results showed that the optimal diagnosis vegetation index of rice was GWDRVI(R²=0.7554)、GDVI(R²=0.7204)和DVI(R²=0.6386)at tillering stage, jointing stage and heading stage, respectively, with critical diagnosis values of -0.384, 0.658 and 0.782, total nitrogen application of 298.4kg/hm², optimal economic fertilization of 285.5kg/hm², maximum yield of 11168.5kg/hm² and optimal economic yield of 11155.6kg/hm², Jianjian The model of quantitative topdressing was established: tillering stage y = -26.74x-10.27, jointing stage y = -38.42x + 19.21, heading stage y = -148.32x + 115.99. The diagnosis of nitrogen nutrition and the establishment of quantitative model in the critical growth period of rice provide theoretical basis for the visualization of quantitative fertilization.