The invention discloses an analysis method of a vehicle drowning accident based on a motion analysis. Preliminary data are obtained through a scene investigation, other data are obtained by calculation according to a theoretical formula, so that the real data of the scene of the accident are determined and restored. According to the analysis method of the vehicle drowning accident based on the motion analysis, the technical problem of analyzing and restoring the situation in which the vehicle falls from the road into a river channel or a pond at one side of the road is solved, the data of falling speed and the like are obtained, the obtained data are used by relevant units for analysis and judgment, that is, the analysis method of the vehicle drowning accident based on the motion analysis is intended to obtain data.