The invention provides an airport ground aircraft slide route automatic calculating method. An airport is described into a two-dimensional grid, wherein slide routes are set to be arcs in the two-dimensional grid, a gate position and a departing crossing are set to be nodes in the two-dimensional grid and intersection points between the slide routes are also set to be nodes in the two-dimensionalgrid; and in a mathematic model building and calculating process, the optimal route can be obtained by only calculating the nodes through which an aircraft passes and the arriving time of the aircraft at each node. In the calculating method, the ground layouts, namely the gate positions, the departing crossing and the intersection points between the slide routes, are all replaced by the nodes andno loss is caused in the calculating process, so that the slide routes of active targets on the airport ground are reasonably arranged in real time and the conflicts between the slide routes are effectively avoided.