Neck-hung Bluetooth earphone

The utility model provides a neck hanging type Bluetooth earphone, which comprises a main shell, a first wearing part and a second wearing part, the first wearing part and the second wearing part are connected through a data line, and two opposite sides of the main shell are respectively provided with a mounting hole for the data line to pass through. The size of the mounting hole is smaller than that of the data line so as to limit the movement of the data line; a mounting disc is arranged in the main shell, a central shaft is arranged on one side of the mounting disc, the data line is coiled into a turbine shape around the central shaft, a coil spring is mounted on the other side of the mounting disc, and the coil spring is used for pre-tightening the mounting disc; the main shell is further provided with a sliding button, the sliding button comprises a sliding part, a clamping part and a spring, the installation disc is provided with a notch matched with the clamping part, one end of the spring is fixed to