The invention, which belongs to the technical field of electronic products, provides a network cable tester with a music playing function, which comprises a shell and a built-in battery. The shell is internally provided with a music player connected with the battery; an earphone hole of the music player is arranged in the side surface of the shell; the side surface of the shell is provided with an external sound box connected with the music player; the shell is provided with a switch connected with the battery; and the switch is provided with a working indication lamp. According to the scheme of the invention, the network cable tester has a function of listening to music, and earphones can be used for independently listening. Due to the preferable external sound box, the switch and the indication lamp, the purpose of enjoying music by multiple persons at the same time can be realized, and the working state of the music player can be intuitively displayed.