Disclosed is a seat-type air-extracting suction apparatus to aid bowel movement having a main body (10), a support frame (20), a vacuum motor (30) and a pressure regulation valve (40), wherein the main body (10) is provided with a loading housing (11), a seat cushion (13) and an extraction box (12), the loading housing (11) has a first through hole (111), the seat cushion (13) is provided on the loading housing (11) and is formed with a guidance hole (131), the guidance hole (131) is aligned with the first through hole (111) of the loading housing (11), the extraction box (12) penetrates through and is provided in the loading housing (11), and an internal space of the extraction box (12) corresponds to the first through hole (111). The support frame (20) is provided on the outside of the main body (10) and is provided with a starting switch (22). The vacuum motor (30) is connected to the main body (10) and is used for extracting air to reduce the pressure inside the loading housing (11), a negative pressure effect being created when extracting air via the vacuum motor (30), aiding the bowel movement of a user. The pressure regulation valve (40) is able to adjust the pressure inside the loading housing (11) to meet the comfort level of the user.