Method and device for rousing MCU

The invention discloses a method and a device for rousing a MCU, which belong to the technical field of intelligent equipment. The method comprises that when a first MCU triggers a communication event which transmits data to a second MCU, whether the second MCU is deeply sleeping is determined; if the second MCU is deeply sleeping, an interrupting rousing signal is sent to the second MCU by a rousing pin connected between the first MCU and the second MCU so as to rouse the second MCU; and by the rousing pin connected between the first MCU and the second MCU, the interrupting rousing signal is sent to the second MCU. In this way, the MCU which is deeply sleeping can be aroused by an external interrupting event triggered by the MCU besides the MCU which is deeply sleeping, and communications can be realized without waiting for the MCU aroused by an internal interrupting event, so efficiency of the inter-MCU communications is increased.