The invention discloses an LED driving circuit applying a cold twin-pole type dynatron, comprising a rectifying filtering circuit, a cold twin-pole type dynatron, and a feedback adjusting circuit; a control end of the cold twin-pole type dynatron is electrically connected with the rectifying filtering circuit so as to trigger the conduction of the cold twin-pole type dynatron through the rectifying filtering circuit; an input end of the feedback adjusting circuit is electrically connected with the output end of the cold twin-pole type dynatron, and the output end thereof is electrically connected with the control end of the cold twin-pole type dynatron so as to feedback and control the on-off of the cold twin-pole type dynatron according to the output signal of the cold twin-pole type dynatron, thus the output end of the cold twin-pole type dynatron outputs a high frequency voltage signal to drive an LED to work; the design can drive high-power LED; for the cold twin-pole type dynatron is high in temperature resistance, the cost is largely saved; meanwhile, the cold twin-pole type dynatron is stable in work, not easy to damage, and high in durability.