Embodiments of the present invention relate to the technical field of flight logs, and particularly relate to a flight log upload method and device, a mobile terminal, and an unmanned aerial vehicle. The flight log upload method is applied to a mobile terminal, and comprises: receiving a trigger operation performed by a user, wherein the trigger operation is used to determine a flight log upload instruction; sending, according to the flight log upload instruction, a log transmission channel establishment instruction to an unmanned aerial vehicle, such that the unmanned aerial vehicle establishes a log transmission channel, wherein the unmanned aerial vehicle is communicatively connected to the mobile terminal; and obtaining a flight log of the unmanned aerial vehicle by means of the log transmission channel, and uploading the flight log to a server. The method in the embodiments of the present invention prevents flight log errors caused by operational errors, and improves the accuracy of flight log uploading.
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