By referring to ancient and modern books

papers and other relevant materials

it was found that the development of acupuncture techniques has experienced four periods

including "beginning"（cutting and puncturing for soft tissue infection）

"formulation"（nine needling for various disease of bi syndrome）

"improvement"（specific needling for specific diseases）

and "re-innovation"（accurate and composite modern acupuncture techniques）. The demand for treatment of major diseases in each period has determined the direction changes of needling instruments. From single disease in the early period to concurrent multiple diseases in later period

and from effectiveness to safety

the shape and design of needling instruments has become more and more complex and refined. The changes of needling instruments have promoted the development of acupuncture techniques; healing stone has set a precedent of using acupuncture techniques in treating diseases; the emergence of needling techniques has improved the treatment of soft tissue diseases; the polymorphic needles represented by nine needles has promoted the diversity of needling techniques; and modern needling instruments have supported the re-innovation of techniques. As needling instruments develop from single shape to multiple shapes

acupuncture techniques progress from simple to complex mode gradually. In conclusion

the changes of needling instruments are driven by the need for treating diseases effectively and safely and supported by the advancement of new materials and production technology; moreover

instruments changes will promote the revolution of acupuncture techniques.