The invention provides a method for planning a flight route of a short-distance transportation unmanned aerial vehicle, and the method comprises the following steps: 1, reading a model, to be more specific, reading a map with building height data from a map database; 2, determining a height, to be more specific, calculating the average value of the building height data; 3, intercepting a constant-height surface, to be more specific, intercepting a corresponding plane graph from map data by use of the calculated average value as an interception height; 4, bending a connection line, to be more specific, taking a point on one part, passing through a building cover surface, of the connection line between a starting point and a terminal point as a bending point to bend the connection line and enable the connection line not to pass through any building cover surface; 5, optimizing a path, to be more specific, the height of the obtained connection line is increased by 3 to 10%, two ends of the connection line are connected with the connection line are connected with the starting point and the terminal point, and curve smoothing treatment is performed on the two ends of the connection line; and 6, sending the path. According to the method, the flight path planning problem of the short-distance transportation unmanned aerial vehicle can be effectively solved by a process with an extremely small amount of calculation in a very low cost manner.