Ecological water supply priority division method and system based on vegetation ecological network

The invention discloses an ecological water supply priority division method and system based on a vegetation ecological network, and the method comprises the steps: calculating the areas of pattern spots of different land coverage types based on land utilization type data, screening out the pattern spots with the areas larger than a threshold value, and carrying out the calculation of the pattern spots; establishing a circular buffer area with the same area as the pattern spot by taking the centroid coordinate of the pattern spot as a circle center as an ecological source land; and a resistance surface of the region is set according to multi-source data such as terrain, NDVI and earth surface covering types. And on the basis, extracting the ecological corridor by using a minimum resistance model. And water supply priority division is carried out on each ecological gate according to the number of ecological sources covered by the water supply area of each ecological gate in the to-be-decided area, the ecologic