A communication apparatus with a network multimedia playback function includes a network dialup module, a multimedia module and a communication exchange module. The network dialup module can receive an electronic signal from a regular telephone wire and analyze the electronic signal to obtain an analog network packet or an audio/video packet, and processes the analog network packet into a network data and sends the network data to a computer. The multimedia module receives the audio/video packet from the network dialup module, and processes the audio/video packet into an audio/video data and sends the audio/video data to a display apparatus. The communication exchange module is provided with a voice splitter that analyzes the electronic signal to obtain a voice signal of low frequency and sends it to the communication exchange module. Thus, the communication apparatus provides the functions of a network connection, a multimedia playback, and a dialing of Internet phone.