The invention relates to a digital interphone with a sound recording function, wherein a radio frequency part consists of a transmitter, a receiver, a phase lock loop (PLL) and an antenna, a base band part consists of a high-performance processor ARM chip, a modulation demodulator, a flash memory and an audio processing chip, an audio part consists of an audio power amplification circuit, a microphone (MIC) and a loudspeaker, the modulation demodulator adopts a voice coding algorithm, the voice information is compressed to the speed rate being 2.4K, the ARM chip reads data stored in flashes according to selection, the voice is decoded through the modulation demodulator, the data is restored into voice, and digital signals are converted into analog signals through digital-to-analog (DA) conversation and are then output to the loudspeaker after being magnified through audio power amplification. The ARM chip reads data stored in the flashes, the data is transmitted out by the transmitter after the data coding regulation through the modulation demodulator, the voice coding algorithm is adopted, the occupied space of voice is effectively reduced, the recording time is prolonged, the voice quality is clear, the noise is low, the sound recoding content is displayed through the digital interphone, and can also be played and received by the interphone in a remote way.