Central venous catheter device with alarm function

A central venous catheter device with an alarm function comprises a central venous catheter, a pressure sensor, an alarm and a bending sensor, the pressure sensor is arranged on the outer side wall of a catheter body, buried in the muscle, of the central venous catheter, the alarm is connected with the pressure sensor and the bending sensor, and the bending sensor is connected with the pressure sensor. The bending sensor is worn on the joint of a patient, traction of muscles of the patient is sensed through the bending sensor, muscle pressure borne by a catheter body of the central venous catheter is sensed through the pressure sensor, and when the bending sensor senses that the patient gets up or moves to cause muscle traction, a signal is sent to the alarm; when the pressure sensor senses that the pressure borne by the catheter body reaches a threshold value enabling the catheter body to be bent or shifted, a signal is sent to the alarm; when the alarm receives the signals at the two positions at the same t