The invention discloses a method and a device for determining attribution type of a non-noise audio frequency signal, the method first obtains a frequency spectrum characteristic parameter of the non-noise audio frequency signal, and then determines the attribution type of the current non-noise audio frequency signal according to the frequency spectrum characteristic parameter of the non-noise audio frequency signal and a set characteristic parameter threshold value. It can be known that the method determines the attribution type of the current non-noise audio frequency signal according to the frequency spectrum characteristic parameter of the non-noise audio frequency signal, hence the embodiment of the invention is able to exist with deviation from a coding arithmetic so as to include the independence and the transplantability.