Earphone with adjustable tone quality

The utility model discloses an earphone capable of adjusting sound quality, which comprises a first shell and a second shell which are spliced with each other, and the first shell and the second shell define an accommodating cavity; the first shell is provided with a contact surface which is opposite to the second shell and is attached to the ear, one side, opposite to the first shell, of the second shell integrally extends downwards to form a connecting part, one side, opposite to the first shell, of the second shell is provided with a first tuning group and a second tuning group, and the first tuning group and the second tuning group are respectively arranged on the left side and the right side of the connecting part. Each of the first tuning group and the second tuning group comprises a plurality of first tuning holes and a plurality of second tuning holes, the first tuning holes and the second tuning holes are communicated with the accommodating cavity, the first tuning holes and the second tuning holes o