Provided is a flexible puncture needle device. A flexible puncture needle comprises a puncture needle (10)； the puncture needle (10) comprises an outer sleeve tube (11) and a center tube (13)； the outer sleeve tube (11) comprises a puncture needle head (111) and a plurality of bending sections (112)； the tip of the puncture needle head (111) is provided with a needle tip； the rear end of the puncture needle head (111) is provided with a pair of recessed grooves (1122) or a pair of protrusions (1121)； the pair of protrusions (1121) or pair of recessed grooves (1122) are respectively provided at both ends of the bending sections (112). The pair of protrusions (1121) or pair of recessed grooves (1122) at one end of the bending section (112) is engaged with the pair of recessed grooves (1122) or pair of protrusions (1121) at the rear end of the puncture needle head (111), forming a needle-head bending joint； the adjacent bending sections (112) are engaged with each other by means of the protrusions (1121) or the recessed grooves (1122) to form a bending joint； the needle-head bending joint and the plurality of bending joints are sequentially engaged with each other from head to tail to form an outer sleeve tube (11) whose tip is provided with the puncture needle head (111) and whose tube body may be bent axially. The center tube (13) is inserted into the outer sleeve tube (11) from the distal end of the puncture needle head (111) of the outer tube (11) to form a center tube empty part (114) and a center tube insertion part (115) of the outer sleeve tube (11)； the center tube empty part (114) can be bent, during the process of the center tube (13) moving forward or backward, in the outer sleeve tube (11), along the axis of the outer sleeve tube (11), the bending angle of the center tube empty part (114) changes with the length of the center tube empty part (114).L'invention concerne un dispositif à aiguille de ponction flexible. Une aiguille de ponction flexible comprend
