A multiplexed display apparatus and method for a digital broadcast receiver are provided. A multi-screen display apparatus for a digital broadcast receiver of the present invention includes a broadcast reception unit for receiving broadcast data of a primary service channel and at least one secondary service channel; a decoding unit comprising a video decoder for decoding video data of all types of video frame of the primary service channel and a predetermined type of video frame of the secondary service channel and an audio decoder for decoding audio data of a predetermined service channel, by time frame; a multiplexed screen processing unit for multiplexing the video data of the primary service channel and the at least one secondary service channel output by the decoding unit; a display unit for displaying the multiplexed video data in the form of multiplexed screen image; and a speaker unit for outputting the decoded audio data in the form of an audible sound wave.