Continuous negative pressure puncture needle convenient for single-person bare-handed operation and convenient for material taking

The invention discloses a continuous negative pressure puncture needle capable of being conveniently operated by a single person in a bare-handed mode and facilitating material taking, and particularly relates to the field of negative pressure puncture needles. The continuous negative pressure puncture needle comprises a needle cylinder and a needle biopsy needle installed at one end of the needle cylinder, a needle cylinder inner core is arranged in the needle cylinder, and a holding rod is integrally connected to one end of the needle cylinder inner core; sliding grooves are formed in the two sides of the inner wall of the needle cylinder, and a plurality of limiting holes for limiting an inner core of the needle cylinder are formed in the inner walls of the sliding grooves. According to the continuous negative pressure puncture needle, by arranging the push rod, the clamping block and the limiting hole, when puncture extraction is conducted, extraction is conducted by pulling the needle cylinder inner core