The utility model relates to an unmanned aerial vehicle bomb dropping fixing device which comprises a shell, a plurality of first clamping mechanisms, a plurality of second clamping mechanisms and an auxiliary fixing mechanism, the first clamping mechanisms are arranged on the inner side of the shell and used for clamping standard ammunition placed vertically, and the second clamping mechanisms are used for clamping standard ammunition placed vertically. The bottom of the shell is provided with a plurality of mounting holes matched with the first clamping mechanisms correspondingly, a second clamping mechanism is further arranged on the inner side of the shell, a clamping jaw of the second clamping mechanism penetrates through and extends to the bottom of the shell, the second clamping mechanism is used for clamping the standard ammunition which is horizontally placed, and an auxiliary fixing mechanism is arranged at the bottom of the shell. A connecting plate used for being fixedly connected with the unmanned aerial vehicle is arranged at the top of the shell, the connecting plate is fixedly connected with the unmanned aerial vehicle through a bolt, the first clamping mechanism and the second clamping mechanism are arranged, standard ammunition which is vertically placed and standard ammunition which is horizontally placed can be clamped respectively, and the throwing requirements of different ammunition types are met; and the adaptability and the flexibility of the device are enhanced.