The invention discloses a device capable of reducing noise actively and improving sound quality of an earphone. A main control box is respectively connected with an electric signal output of a left-channel noise-reducing speaker sp L1 and an electric signal output of a left-channel voice and music speaker sp L2; the main control box is respectively connected with an electric signal input of a feed-forward type microphone mic L1 and an electric signal input of a feedback type mic L2; the main control box is respectively connected with an electric signal output of a right-channel noise-reducing speaker sp R1 and an electric signal output of a right-channel voice and music speaker sp R2; and the main control box is respectively connected with an electric signal input of a feed-forward type microphone mic R1 and an electric signal input of a feedback type mic R2. According to the device capable of reducing noise actively and improving sound quality of the earphone, the noise-reducing output and the voice and music output are realized independently by two speakers through the left-channel noise-reducing speaker sp L1, the left-channel voice and music speaker sp L2, the right-channel noise-reducing speaker sp L2 and the right-channel voice and music speaker sp R2. Mutual influence during the work is reduced, and the effects of sound quality of the voice of people and the music are improved independently and effectively.