Dynamic sea ice risk early warning method and system for ice region navigation

The invention provides an ice region navigation dynamic sea ice risk early warning method and system, and the method comprises the steps: firstly obtaining navigation information of a target ship, first navigation radar image information at a first time point, and second navigation radar image information at a second time point, and calculating a time interval between the two time points; respectively capturing regions of interest of the sea ice echoes through the mask matrixes, and respectively filling pixels of the regions of interest of the sea ice echoes and pixels of other regions except the regions of interest of the sea ice echoes with different colors to obtain binary images of the sea ice echoes at two time points; then calculating the distance between each piece of sea ice and the target ship, the azimuth angle and the latitude and longitude coordinates of the mass center of the sea ice at two time points by adopting a specific calculation method, calculating the collision probability of the sea ice