Integrated digital demodulation method and device

The invention provides an integrated digital demodulation method and device, and the method comprises the steps: carrying out the quadrature modulation of a received signal, and obtaining an I-path decomposed quadrature signal and a Q-path decomposed quadrature signal; filtering the I-path decomposed orthogonal signal and the Q-path decomposed orthogonal signal through a low-pass filter; and when the signal is an AM signal, tuning the filtered I and Q paths of decomposed orthogonal signals through a tuner to obtain a corresponding AM signal. Compared with the prior art, subsequent processing can be carried out on different signals respectively, digital processing on three different signals is realized by utilizing the combination of the same tuner, a plurality of multipliers and registers, and compared with the prior art, the number of logic modules is effectively reduced on the premise of ensuring the signal demodulation accuracy due to the adoption of multiplexing of a plurality of logic modules. 本发明提供了一种一体