The invention provides a dynamic planning method for an unmanned aerial vehicle path based on two-dimensional and three-dimensional integration. The method comprises the steps of 1, carrying out oblique photography modeling on an unmanned aerial vehicle path planning area; 2, planning an initial unmanned aerial vehicle path and a height attribute value in a two-dimensional map window; 3, judging whether a waypoint in a three-dimensional map window is outside the ground object or not based on a GIS limiting surface analysis algorithm; 4, judging the intervisibility among the waypoints in the three-dimensional map window based on a GIS intervisibility algorithm; 5, judging whether the new waypoint is outside the ground object or not in the three-dimensional map window; and step 6, obtainingthe waypoint position and height attribute value of the unmanned aerial vehicle path in the two-dimensional map window. Compared with the traditional unmanned aerial vehicle path planning method, themethod provided by the invention can meet the safety requirement of the unmanned aerial vehicle path in a complex real environment on the one hand, and can greatly improve the unmanned aerial vehiclepath planning efficiency on the other hand.