A pipeline pressure monitoring device , comprising: a housing , one side of the housing having a mounting hole ; a vent nozzle , the vent nozzle having a vent , the vent nozzle being installed in the housing , one end of the vent nozzle extending out of the housing via the mounting hole , a first stop block being provided on the vent nozzle ; a first circuit board , installed in the housing ; a pressure sensor , configured to detect pressure inside the vent nozzle , the pressure sensor being installed on the first circuit board and connected to the first circuit board , the pressure sensor being matched with another end of the vent nozzle facing an inside of the housing , the pressure sensor being installed at the another end of the vent nozzle facing the inside of the housing to block the another end; a sliding sleeve , installed in the mounting hole in a sliding manner, the sliding sleeve having a through hole , the sliding sleeve being sleeved on the vent nozzle via the through hole , a limit member being provided on the sliding sleeve , the limit member being located inside the housing ; an elastic member , sleeved on the vent nozzle and sandwiched between the first stop block and the sliding sleeve ; a magnetic block , installed on the sliding sleeve ; a second circuit board , installed in the housing and connected to the first circuit board ; and a position sensor , installed on the second circuit board and connected to the second circuit board , wherein the installation position of the position sensor meets that: after a consumable connector is installed on the vent nozzle , the distance that the sliding sleeve slides toward the inside of the housing is just enough to make the magnetic block move into a detection area of the position sensor . a housing , one side of the housing having a mounting hole ; a vent nozzle , the vent nozzle having a vent , the vent nozzle being installed in the housing , one end of the vent nozzle extending out of the housing via the mounting hole , a first stop block being provided on the vent nozzle ; a first circuit board , installed in the housing ; a pressure sensor , configured to detect pressure inside the vent nozzle , the pressure sensor being installed on the first circuit board and connected to the first circuit board , the pressure sensor being matched with another end of the vent nozzle facing an inside of the housing , the pressure sensor being installed at the another end of the vent nozzle facing the inside of the housing to block the another end; a sliding sleeve , installed in the mounting hole in a sliding manner, the sliding sleeve having a through hole , the sliding sleeve being sleeved on the vent nozzle via the through hole , a limit member being provided on the sliding sleeve , the limit member being located inside the housing ; an elastic member , sleeved on the vent nozzle and sandwiched between the first stop block and the sliding sleeve ; a magnetic block , installed on the sliding sleeve ; a second circuit board , installed in the housing and connected to the first circuit board ; and a position sensor , installed on the second circuit board and connected to the second circuit board , wherein the installation position of the position sensor meets that: after a consumable connector is installed on the vent nozzle , the distance that the sliding sleeve slides toward the inside of the housing is just enough to make the magnetic block move into a detection area of the position sensor . <EOS>