An adjustable Bluetooth wireless earphone primarily comprises an earphone body pin-connecting with a link-part at the front upper portion thereof so that the earphone can be rotated in all direction using the link-part as an axis and the link-part connects with a plug-set. The plug-set can co-move with the link-part. When the plug-set plugged the ear of the user, using the feature that the earphone body can be rotated in all direction, so the earphone body can be pressed close to the cheek portion of the user to form an angle between the earphone body and the plug-set, such that the plugged plug-set may stay more tightly on the ear of the user and not drop off easily.