Abstract: Suspended solids concentration is one of the important parameters to evaluate water quality and regional ecological environment. Based on the measured suspended sediment concentration and synchronous spectral data of the Three Gorges Reservoir area and Changshou Lake in May 2020, and compared with the landsat-8, sentinel-2 and GF-1 satellite remote sensing image data, this paper analyzes the correlation between the water leaving spectral reflectance and the concentration of suspended solids in the water body under different satellite simulation bands and different band combinations, selects the sensitive bands of suspended solids in the Three Gorges Reservoir area, and attempts to calibrate its effective parameter range. Using linear, exponential, polynomial and other mathematical statistical regression methods, the inversion models corresponding to three types of satellites are established respectively. The optimal models that different satellites can be used for remote sensing inversion and monitoring of suspended sediment concentration in the Three Gorges Reservoir area are compared, and an optimal model is selected for remote sensing monitoring of suspended sediment concentration in the Three Gorges Reservoir area of the Yangtze River. The results show that: (1) among the three types of satellite data, the band combination of near-infrared / green light has the most significant correlation with suspended sediment concentration, in which the correlation coefficient of landsat-8 is 0.771 3 (p<0.001), sentnel-2 is 0.773 4 (p<0.001), GF-1 is 0.730 0 (p<0.001); (2) The best regression models of the three types of satellites are linear models, and the model R2 is more than 0.60. The equation F test passes the 99% confidence interval, indicating that the commonly used three types of satellites can be effectively applied to the monitoring of suspended solids in the Three Gorges water body. However, combined with the characteristics of the water body in the Three Gorges of the Yangtze River, the accuracy of model verification, the spatiotemporal resolution and the difficulty of data acquisition, sentinel-2 satellite data is considered to be the most suitable for the operational application monitoring of suspended solids in the Three Gorges area; (3) The concentration of suspended sediment in the Three Gorges of the Yangtze River is higher than that in the center of the river and higher in the downstream than that in the upstream. The concentration in summer is significantly higher than that in spring. The concentration of suspended sediment increases significantly in July and August when the water volume increases and floods occur frequently; In May, the concentration of suspended sediment in the main stream of the Yangtze River was basically about 40-80 mg/L, and the concentration along the river bank reached about 100 mg/L. In July and August, the concentration of suspended sediment remained about 80-120 mg/L, and even reached more than 160 mg/L in the downstream area. As for Changshou Lake, which is an inland lake in the tributary, the suspended sediment concentration shows the distribution characteristics that the suspended sediment concentration is higher on the bank than in the center of the lake. The fluctuation of suspended sediment content in different periods is small, and the flood in the main stream of the Yangtze River has little impact on it. The concentration in the lake is basically about 40-80 mg/L in May, July and August, and the concentration on the Bank of the lake reaches 110 mgmg / L.