The present invention discloses a set of user equipment and a sleep wake-up method. The user equipment includes a first processor and a second processor; the first processor is connected with the second processor through a USB interface; and when the first processor or the second processor requires sleep, the first processor is used for cutting off a USB connection. According to the user equipment and the sleep wake-up method of the invention, when the first processor sleeps, the USB connection is cut off, the second processor is enabled to autonomously sleep; when the second processor has an initiative event, the first processor is awaked initiatively to carry out USB re-connection, and therefore, the event of the second processor side can be transmitted to the first processor in real time, after the processing of the event is completed, the first processor is notified to cut off the USB connection, and therefore, a system can sleep, and power consumption can be decreased; and when the first processor has a request event to the second processor, USB reconnection is initiatively triggered, after the processing of the event is completed, a USB connection is initiatively cut off, and therefore, the normal sleep of the system can be ensured, and power consumption can be decreased.