The present invention relates to a mobile communication terminal and operation control method thereof: A mobile communication terminal according to the present invention comprises: an input unit having at least one searching keys specified for a section search of multimedia data; and a controller allocating the searching keys to predetermined reproducing positions of the multimedia data, respectively, and controlling reproducing time points of the multimedia data to be moved to reproducing positions allocated to the searching key if the searching keys are input. The present invention uses the searching keys specified for the section search upon reproducing the multimedia data to rapidly perform the section search, making it possible to easily use products regarding a mobile communication terminal.