This paper proposes an unequal error protection(UEP)coding method to improve the transmission performance of three-dimensional(3D)audio based on expanding window fountain(EWF).Different from other transmissions with equal error protection(EEP)when transmitting the 3D audio objects.An approach of extracting the important audio object is presented,and more protection is given to more important audio object and comparatively less protection is given to the normal audio objects.Objective and subjective experiments have shown that the proposed UEP method achieves better performance than equal error protection method,while the bits error rates(BER)of the important audio object can decrease from 10~(–3) to 10~(–4),and the subjective quality of UEP is better than that of EEP by 14%. This paper proposes an unequal error protection (UEP) coding method to improve the transmission performance of three-dimensional (3D) audio based on expanding window fountain (EWF). Different from other transmissions with equal error protection (EEP) when transmitting the 3D audio objects.An approach of extracting the important audio object is presented, and more protection is given to more important audio object and comparatively less protection is given to the normal audio objects. Objective and subjective experiments have shown that the proposed UEP method achieves better performance than equal error protection method, while the bits error rates (BER) of the important audio object can decrease from 10 ~ (-3) to 10 ~ (-4), and the subjective quality of UEP is better than that of EEP by 14% .