The invention relates to a power transmission line suspicious flying object recognition method. The method comprises the following steps of: measuring wind power of surrounding environment of a powertransmission line; if the wind power is greater than a set level, continuously acquiring images or videos of the surrounding environment of the power transmission line; carrying out comparative analysis on the images or videos and a locally stored static image, so as to judge whether a suspicious foreign matter exists in the surrounding environment of the power transmission line; if the judging result is positive, continuously acquiring the images or videos and calculating moving speeds of the foreign matter; and if the moving speed of the foreign matter accords with a pre-warning condition, determining the foreign matter as a suspicious flying object. Compared with the prior art, the method is capable of judging whether foreign matters are suspicious flying objects or not according to wind power, wind directions and moving speeds of the foreign matters, and is more correct in judgement result.