Pillar and door connecting device

The utility model discloses a pillar and door connecting device. The pillar and door connecting device comprises a door body connecting piece for connecting a door body and a door frame pillar connecting assembly for connecting a door frame pillar; the door body connecting piece is of a vertical square groove structure, and the door body connecting piece and a door body mounting part to be connected are cooperatively mounted by the cooperation of the width of the square groove structure and the thickness of the door body mounting part to be connected; the door frame pillar connecting assembly comprises a first door frame pillar connecting piece and a second door frame pillar connecting piece and both of which are mutually connected in a crossed manner to form a pincer-shaped structure.