The invention discloses a substrate integrated waveguide different plane feeding-based embedded type W wave band waveguide filter. A resonant cavity is processed via use of a metal backplane of a radio frequency shielding box and embedded in the metal backplane of the radio frequency shielding box, and an upper feed structure and a lower feed structure of the filter form a closed cover plate of the filter; compared with a conventional filter form, the filter put forward in the invention is advantageous in that an existing structure of a metal shielding box is used for forming a main body partof the filter, the filter is hidden in the metal backplane and does not need to be mounted on a circuit board on an upper surface or a lower surface of the metal backplane, other devices can be mounted on the circuit board, installation space of the filter can be greatly saved, and therefore the filter is enabled to be compact in structure; miniaturization of a transmit-receive assembly can be facilitated.