Evaluation method based on airspace grid

The invention provides an assignment method based on airspace grids, and belongs to the field of air traffic management. The method specifically comprises the following steps: firstly, performing grid recursion division on a target airspace; for each aircraft in the target airspace at the moment t = ta, according to the real-time flight dynamics, meteorological information and flight plans, parameters are given to the position of each aircraft in each sub-grid, and a deterministic grid assignment matrix is formed; meanwhile, according to errors existing in the flight process of the aircrafts, a probability type grid assignment matrix is established, and the probability of the actual sub-grids where the aircrafts are located is assigned; and finally, respectively calculating the complexity of the target airspace, the flight flow in the grids and the collision probability by using the determined grid assignment matrix and the probabilistic grid assignment matrix of each aircraft, and providing reference data fo