1. A method for detecting an endpoint of an audio record, comprising presetting a mute duration threshold as a first time threshold; wherein the method further comprises: obtaining an audio record text; determining an acoustic model for a text endpoint of the audio record text; and obtaining each frame of audio record data in turn starting from an audio record start frame of the audio record data; determining a characteristics acoustic model of a decoding optimal path for an obtained current frame of the audio record data; and determining that the characteristics acoustic model of the decoding optimal path for the current frame of the audio record data is the same as the acoustic model for the endpoint; updating the mute duration threshold to a second time threshold, wherein the second time threshold is smaller than the first time threshold.