This invention relates to the technical field of radio and television equipment, specifically relating to a video-audio transcoding device and method capable of supporting audio unvarnished transmission. The device comprises a system control module, a video-audio input module, a video coding and decoding module, a code stream output module and a power module; the device further comprises an audio unvarnished transmission module and a video-audio multiplexing module; the system control module is electrically connected with the video-audio input module, the video coding and decoding module, the code stream output module, the power module, the audio unvarnished transmission module and the video-audio multiplexing module. By adding the function of audio unvarnished transmission outputting on the existing video-audio transcoder, the complexity and the cost of the coding and decoding equipment are reduced; the original acoustical quality is kept to the maximum extent; and thus, the device has the advantages of simple structure, low cost, greatly improving the work efficiency, saving the cost, etc.