Aiming at the characteristics of mobile terminal equipments, the program of decompressing massive compressed files in mobile rich media applications is investigated in this paper. Firstly, the demand for decompressing is analyzed according to the demand for rich media applications and the special requirements of mobile terminals, so as to design rational decompression program. And then, the optimization of the decompression flow of open source project LiteUnzip, which is to adapt to the characteristics of various mobile platforms, improve the disadvantage of long execution time for single times process, improve decompression efficiency, and renovate LiteUnzip into a high-efficiency decompression program that can be suitable for mobile terminals, is described. Finally, the specific implementation of decompressing massive compressed files in rich media application programs in mobile terminals is achieved. Keywords—decompress, interactive application, mobile terminals, massive compress...