The invention discloses a point moving target state estimation method for a video satellite. The method includes the following steps that: S1, a frame sequence point file is read from a video satellite image product, and the coordinate information of a point moving target, the acquisition time of each frame of image and RPC model parameters corresponding to each frame of image are obtained; S2, the RPC model parameters corresponding to each frame of image are utilized to construct the RPC model of each frame of image; S3, the object space coordinates of each point moving target on each frame of image are calculated according to DEM data and the RPC model of each frame of image; S4, the Chebyshev polynomial model is adopted to perform movement trajectory fitting according to the object space coordinates of the point moving targets; and S5, the motion states of the point target moving targets at any time are estimated through using the trajectory model of the point moving targets. With the point moving target state estimation method for the video satellite of the invention adopted, the problem that the real motion states of the point moving targets of satellite-bone video images are difficult to accurately describe can be solved. The method has the advantages of simple form and convenient use.