A solid state disk and a method for managing power supply of the solid state disk and a terminal including the solid state disk. The solid state disk includes at least one data storage module for storing data, a management module for controlling data operation for said data storage module, controlling said data storage module as an operating power supply state when said data storage module is performing the data operation, and controlling said data storage module as a non-operating power supply state at other times. The data storage module may be enabled as the operating power supply state only when the data operation is performed for a certain data storage module, and the data storage module may be set as the non-operating power supply state when it is in the idle state or after the data operation is completed. Thus, the power consumption of the solid state disk is effectively saved, and the duration of the notebook computer which applies the solid state disk is prolonged.