Abstract: A multi-band and multi-functional antenna integrated module and a preparation method thereof are provided. The multi-band and multi-functional antenna integrated module has an electromagnetic wave capture layer, a frequency selection circuit layer, and a signal processing circuit layer stacked vertically in sequence. The frequency selection circuit layer and the frequency selection circuit layer are interconnected through a metallized through hole. The frequency selection circuit layer has a plurality of frequency selection circuit units with different processing bands. The signal processing circuit layer has a plurality of signal processing circuit units with different functions. The plurality of frequency selection circuit units are interconnected to the plurality of signal processing circuit units in a one-to-one correspondence manner through a plurality of metallized through holes.