The acquisition of high precision satellite orbit and attitude parameters is of great significance for the popularization and application of satellite data product. The data format, meaning of the parameters and dimension of ZY-3 satellite metadata file (. AUX) are analyzed, and the satellite orbit and attitude parameters are fitted for any time. The analysis of the fitting accuracy shows that the ZY-3 satellite orbit is operating smoothly, the accuracy of satellite orbit fitting based on quadratic polynomial can reach meter level, and it keeps a good consistency with 5 m measurement accuracy designed by GPS on the satellite. In the imaging period, its attitude change is quite stable. This value can be used as the initial value of exterior orientation elements applied to the satellite on-orbit geometric calibration and the accurate positioning of image.