A dielectric filter, comprising: a first dielectric block and a second dielectric block that are stacked up, wherein the first dielectric block and the second dielectric block respectively comprise a first surface and a second surface that are opposite to each other, and the first surface of the first dielectric block is opposite to the second surface of the second dielectric block; a first blind hole , a first through hole , and two or more resonance through holes whose openings are located on the first surface of the first dielectric block ; and a second through hole whose opening is located on the second surface of the second dielectric block , wherein metal layers are disposed on an inner wall of the first blind hole , an inner wall of the first through hole , an inner wall of the resonance through holes , an inner wall of the second through hole , the first surface of the first dielectric block , and the second surface of the second dielectric block ; and the metal layer on the first surface of the first dielectric block is opposite to the metal layer on the second surface of the second dielectric block , the metal layer on the first surface of the first dielectric block is connected to the metal layer on the second surface of the second dielectric block , the metal layer on the inner wall of the first through hole is connected to the metal layer on the first surface of the first dielectric block , the metal layer on the inner wall of the first blind hole is connected to the metal layer on the first surface of the first dielectric block , and the metal layer on the inner wall of the second through hole is connected to the metal layer on the second surface of the second dielectric block . a first dielectric block and a second dielectric block that are stacked up, wherein the first dielectric block and the second dielectric block respectively comprise a first surface and a second surface that are opposite to each other, and the first surface of the first dielectric block is opposite to the second surface of the second dielectric block; a first blind hole , a first through hole , and two or more resonance through holes whose openings are located on the first surface of the first dielectric block ; and a second through hole whose opening is located on the second surface of the second dielectric block , wherein metal layers are disposed on an inner wall of the first blind hole , an inner wall of the first through hole , an inner wall of the resonance through holes , an inner wall of the second through hole , the first surface of the first dielectric block , and the second surface of the second dielectric block ; and the metal layer on the first surface of the first dielectric block is opposite to the metal layer on the second surface of the second dielectric block , the metal layer on the first surface of the first dielectric block is connected to the metal layer on the second surface of the second dielectric block , the metal layer on the inner wall of the first through hole is connected to the metal layer on the first surface of the first dielectric block , the metal layer on the inner wall of the first blind hole is connected to the metal layer on the first surface of the first dielectric block , and the metal layer on the inner wall of the second through hole is connected to the metal layer on the second surface of the second dielectric block . <EOS>