Detachable internal arteriovenous fistula puncture blood taking needle

The utility model provides a detachable internal arteriovenous fistula puncture blood taking needle which comprises an internal fistula puncture mechanism and an internal fistula blood taking mechanism, the internal fistula puncture mechanism comprises a puncture hose, a puncture needle head is fixed at the head end of the puncture hose, a puncture needle wing is fixed at the joint of the puncture hose and the puncture needle head, and a puncture needle protective sleeve is arranged outside the puncture needle head. The puncture needle head comprises a puncture hose, the puncture hose is movably sleeved with a liquid stopping clamp and a needle-stick-injury-preventing protective sleeve used for wrapping the puncture needle head, a straight pipe with a handle is fixed to the tail end of the puncture hose, and the tail end of the straight pipe with the handle is detachably connected with an adapter pipe head, and the internal fistula blood sampling mechanism comprises a blood sampling hose with an adapter needl