A method for controlling channel tuning of a digital TV is disclosed, in which a desired channel can easily be tuned in accordance with a user's input in a digital TV having a channel number of a major-minor type. The method for controlling channel tuning of a digital TV includes the steps of tuning a corresponding channel referring to a corresponding channel data depending on whether channel a data of a major number input by a user exists in a previously stored channel map if the user inputs a major number only, controlling an analog channel if the user inputs a major number or a minor number of 0, and controlling tuning of a corresponding channel depending on whether a channel data of the minor number input by the user exists in the previously stored channel map if the user inputs the major number and the minor number not 0. Since the user can recognize the minor channel data of the desired major channel, it is possible to prevent any confusion in selecting a plurality of minor channels from occurring.