The invention discloses a multilayer heterogeneous network base station address selection method based on a gradient algorithm. In an area with a base station to be newly added, from the angle of reducing energy consumption to the largest degree, a jamming intensity minimum point is searched for in the area to place the newly-added base station, geometric Delaunay triangulation is carried out on the area with the base station to be newly added so as to search for the jamming minimum point conveniently, a unique local jamming minimum point exists in each Delaunay triangle, the gradient of a jamming field in the area is calculated, a computer iterative algorithm is adopted, the local jamming minimum point in each Delaunay triangle is searched for fast, and the minimum value point in all the local jamming minimum points is selected as the position where the newly-added base station is placed. According to the fast and effective newly-added base station address selection method, great value is achieved on networking optimization of wireless communication and networks and base station building cost saving.