Self-deformation multi-axial puncture device

The invention relates to a self-deformation multi-axial puncture device. The puncture device is prepared by shape memory alloy, and is composed of a puncture needle sleeve and a corresponding arc puncture needle core, wherein a part of the sleeve at a front section can be changed into an arc shape when a temperature reaches a transformation temperature. The front section of the puncture needle sleeve is in a shape of straight sleeve (1) outside a machine under a high or low temperature far different from a machine temperature, and then is changed to be arc-shaped (5) when the sleeve is in the machine for a while and a temperature of the sleeve is near the machine temperature. A front end of the puncture needle sleeve is provided with a side hole (2) opened towards an inner arc direction of the arc shape turned in a later stage. The puncture needle sleeve at a rear end of the side hole is a circular pipe. A needle point (4) towards axial front of the sleeve is provided at top of the sleeve and on a sleeve wall