An intelligent input method and system based on bone conduction vibration signal propagation. The intelligent input method comprises: S1. a receiving step, an intelligent device receiving a vibration signal by using a vibration sensor, and performing noise reduction processing on the vibration signal; S2. an extraction step, detecting, by means of a double-threshold endpoint detection method, and extracting a vibration signal segment generated by knocking a specified part of a human body; and S3. a processing step, extracting signal features, and classifying signal positions based on an RNM algorithm. The beneficial effects are that the problem of a text input mode of an intelligent watch can not only be solved, but also a high recognition rate can be achieved, and rapid inputting can be carried out without losing the battery life of the intelligent watch.
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