The present invention relates to a file construction for mobile communication device including an execution segment in form of machine language codes and a file execution method using the same, whereby a file in accordance with the present invention comprises a header, a file execution segment formed in machine language codes, and a resource segment to be selected by languages; wherein the header includes data for performing one or more of the functions of: 1) verifying reliability/validity of the file, 2) restricting use of the file (by period of the use, by times of the use), and 3) automatic updating of the file.