Oil production wellhead flow device

The utility model discloses an oil production wellhead flow device which comprises a wellhead sealer part, an oil measuring part, a production flow part and a production management part. And the sealing part realizes wellhead sealing and blowout prevention. And the oil measuring part realizes the functions of connecting a single-well measuring vehicle without stopping a well and replacing a temperature and pressure transmitter without stopping the well. The production process part plays a role in preventing a polished rod from falling into a well due to breakage to prevent crude oil of a ground pipeline from flowing back and blowout; the temperature and pressure sensor is used for monitoring wellhead temperature and pressure, calibrating a temperature and pressure transmitter and sampling gas such as hydrogen sulfide; the effect of preventing the well mouth vertical guide pipe and the ground pipeline from being snapped when the well mouth pops up due to the fracture of the well mouth annular steel plate cause