A method for realizing fast response in a multimedia file control process, comprising: a playing device creating a file playing time index of a multimedia file in a parallel processing manner at a same time when the multimedia file is opened by the playing device; wherein, the process that the playing device opens the multimedia file comprises an initialization process and a process of starting multimedia file playing; the step of a playing device creating a file playing time index of a multimedia file in a parallel processing manner at a same time when the multimedia file is opened by the playing device comprises: the playing device creating the file playing time index of the multimedia file in the parallel processing manner in the initialization process or when starting multimedia file playing; characterized in that the playing device realizes the parallel processing in a multithreading manner, and creates the file playing time index of the multimedia file through one of the following manners: in manner one, the playing device creates a logic control thread and an index creating thread in the initialization process; in the initialization process, an initialization operation of opening the multimedia file is executed through the logic control thread, and the file playing time index of the multimedia file is created through the index creating thread at the same time; in manner two, the playing device creates a logic control thread and an index creating thread in the initialization process, and after finishing the initialization operation of opening the multimedia file through the logic control thread, triggers the index creating thread to create the file playing time index of the multimedia file when starting the playing operation of the multimedia file. a playing device creating a file playing time index of a multimedia file in a parallel processing manner at a same time when the multimedia file is opened by the playing device; wherein, the process that the playing device opens the multimedia file comprises an initialization process and a process of starting multimedia file playing; the step of a playing device creating a file playing time index of a multimedia file in a parallel processing manner at a same time when the multimedia file is opened by the playing device comprises: the playing device creating the file playing time index of the multimedia file in the parallel processing manner in the initialization process or when starting multimedia file playing; characterized in that the playing device realizes the parallel processing in a multithreading manner, and creates the file playing time index of the multimedia file through one of the following manners: in manner one, the playing device creates a logic control thread and an index creating thread in the initialization process; in the initialization process, an initialization operation of opening the multimedia file is executed through the logic control thread, and the file playing time index of the multimedia file is created through the index creating thread at the same time; in manner two, the playing device creates a logic control thread and an index creating thread in the initialization process, and after finishing the initialization operation of opening the multimedia file through the logic control thread, triggers the index creating thread to create the file playing time index of the multimedia file when starting the playing operation of the multimedia file. in manner one, the playing device creates a logic control thread and an index creating thread in the initialization process; in the initialization process, an initialization operation of opening the multimedia file is executed through the logic control thread, and the file playing time index of the multimedia file is created through the index creating thread at the same time; in manner two, the playing device creates a logic control thread and an index creating thread in the initialization process, and after finishing the initialization operation of opening the multimedia file through the logic control thread, triggers the index creating thread to create the file playing time index of the multimedia file when starting the playing operation of the multimedia file.