The embodiment of the invention discloses a model training method, a video category detection method and device, an electronic device and a computer readable medium. An embodiment of the video category detection method comprises the steps of extracting a key frame of a target video, and generating a key frame sequence; inputting the key frame sequence into a feature extraction model to obtain a feature information sequence corresponding to the key frame sequence; and inputting the feature information sequence into a video category detection model to obtain a category detection result of the target video. According to the method and the device, the video category detection efficiency is improved.