The invention provides an IoT chip-oriented multi-level voice intelligent awakening method and system. The method comprises the following steps: S1, when to-be-processed voice is acquired, executing S2; S2, judging whether the to-be-processed voice meets a first preset condition or not; when the to-be-processed voice meets the first preset condition, executing S3; otherwise, ending awakening; S3,judging whether the to-be-processed voice meeting the first preset condition meets a second preset condition or not; if yes, executing S4; otherwise, ending awakening; S4, judging whether the to-be-processed voice meeting the first preset condition and the second preset condition meets a third preset condition or not; if yes, executing S5; otherwise, ending awakening; and S5, comprehensively awakeing the IoT chip. According to the IoT chip-oriented multi-level voice intelligent awakening method provided by the invention, the awakening system is graded, and a step-by-step awakening and step-by-step power-on mechanism is adopted, so that the false awakening rate of the whole chip is reduced, and the overall power consumption of the chip is greatly reduced.