Puncture device

In order to solve the problems that in the field of medical instruments, a needle head is prone to being installed instably and high in cost, the invention discloses a puncture device which comprises a near-end connecting catheter, a telescopic arm, a puncture mechanism and a capturing plate, and the near-end connecting catheter is provided with a channel used for being communicated with a control end; the telescopic arm is arranged at the near-end connecting catheter; the puncture mechanism is arranged in the channel and comprises a needle head, a hollow tube and a suture line, the hollow tube is arranged in the channel and moves along the channel, the suture line is arranged in the hollow tube, the puncture needle is movably arranged at the far end of the hollow tube and connected with the suture line, external threads are arranged on the peripheral wall of the needle head, and the hollow tube can drive the needle head to rotate; the capturing plate is arranged on the telescopic arm and provided with a lock