The invention relates to a frame-skipping synchronizing system of a video player and a control method of the frame-skipping synchronizing system. The frame-skipping synchronizing system comprises a playing ability detection module, a frame-skipping control module, an audio-video decoding module and an audio-video output module, wherein the player can decode a video file in the current general format; the frame-skipping process is reasonably performed under the condition of guaranteeing the normal decoding output of the audio data when the player detects that the processing ability of the player is insufficient in the video playing process, thereby realizing the synchronous playing of the audio and the video; the normal decoding outputs of the audio and the video are performed as a general video player when the player detects that the processing ability of the player is sufficient, and the detection is performed in real time, the frame-skipping time point can be precisely determined once finding that the playing ability is insufficient, and the synchronization of audio and video are done for the selection of a frame-skipping frame; the problem that the video content with high compression ratio, high resolution and high frame rate cannot played in the audio and video synchronization by the general player under the condition that the terminal processing ability is insufficient is solved.