Abstract: The present invention relates to a walkman, particularly to a network walkman which can perform collinear transmission of USB connecting line and audio earphone line. It is mainly characterized in that a switch integrated circuit is added to the conventional circuit to perform the automatic switch-over between the USB interface and the audio output interface, so as to realize the function of collinear transmission of the USB connecting line and the audio earphone line. On the basis of the conventional technique, said two interfaces are simplified as a single interface, which can both obtain more preferable appearance and reduce the cost. Therefore, this invention is convenient for the users and has good applicable function.