A double talk detection method, characterized in that, comprising: detecting, according to a first power corresponding to a far-end digital audio signal and a second power corresponding to a near-end digital audio signal, whether an echo digital audio signal is present in the near-end digital audio signal, wherein the echo digital audio signal is generated when the far-end digital audio signal is played, and the near-end digital audio signal comprises at least one of a near-end speaker's digital voice signal and the echo digital audio signal; determining, according to an energy ratio between the far-end digital audio signal and the near-end digital audio signal, and a frequency coherence value between the near-end digital audio signal and the far-end digital audio signal, whether the near-end speaker's digital voice signal is present in the near-end digital audio signal when the echo digital audio signal is present in the near-end digital audio signal, wherein the frequency coherence value is calculated based on the first power, the second power and an associated power between the near-end digital audio signal and the far-end digital audio signal, and wherein the presence of the near-end speaker's digital voice signal in the near-end digital audio signal indicates that double talk is detected; wherein the determining, according to an energy ratio between the far-end digital audio signal and the near-end digital audio signal, and a frequency coherence value between the near-end digital audio signal and the far-end digital audio signal, whether the near-end speaker's digital voice signal is present in the near-end digital audio signal, comprises: determining whether the energy ratio is greater than an energy threshold; determining the near-end speaker's digital voice signal is present in the near-end digital audio signal when it is determined that the energy ratio is greater than the energy threshold; determining whether the frequency coherence value is smaller than a coherence value threshold when it is determined that the energy ratio is not greater than the energy threshold; and determining the near-end speaker's digital voice signal is present in the near-end digital audio signal when it is determined that the frequency coherence value is smaller than the coherence value threshold. detecting, according to a first power corresponding to a far-end digital audio signal and a second power corresponding to a near-end digital audio signal, whether an echo digital audio signal is present in the near-end digital audio signal, wherein the echo digital audio signal is generated when the far-end digital audio signal is played, and the near-end digital audio signal comprises at least one of a near-end speaker's digital voice signal and the echo digital audio signal; determining, according to an energy ratio between the far-end digital audio signal and the near-end digital audio signal, and a frequency coherence value between the near-end digital audio signal and the far-end digital audio signal, whether the near-end speaker's digital voice signal is present in the near-end digital audio signal when the echo digital audio signal is present in the near-end digital audio signal, wherein the frequency coherence value is calculated based on the first power, the second power and an associated power between the near-end digital audio signal and the far-end digital audio signal, and wherein the presence of the near-end speaker's digital voice signal in the near-end digital audio signal indicates that double talk is detected; wherein the determining, according to an energy ratio between the far-end digital audio signal and the near-end digital audio signal, and a frequency coherence value between the near-end digital audio signal and the far-end digital audio signal, whether the near-end speaker's digital voice signal is present in the near-end digital audio signal, comprises: determining whether the energy ratio is greater than an energy threshold; determining the near-end speaker's digital voice signal is present in the near-end digital audio signal when it is determined that the energy ratio is greater than the energy threshold; determining whether the frequency coherence value is smaller than a coherence value threshold when it is determined that the energy ratio is not greater than the energy threshold; and determining the near-end speaker's digital voice signal is present in the near-end digital audio signal when it is determined that the frequency coherence value is smaller than the coherence value threshold. determining whether the energy ratio is greater than an energy threshold; determining the near-end speaker's digital voice signal is present in the near-end digital audio signal when it is determined that the energy ratio is greater than the energy threshold; determining whether the frequency coherence value is smaller than a coherence value threshold when it is determined that the energy ratio is not greater than the energy threshold; and determining the near-end speaker's digital voice signal is present in the near-end digital audio signal when it is determined that the frequency coherence value is smaller than the coherence value threshold.