As voltage feedback op amps by their mode of signal transmission constraints,can not meet the current rapid development of high-speed systems in speed and frequency.By using current technology design and manufacture of analog current feedback op amp,the working speed,accuracy,bandwidth and linearity have received high performance.Energy saving in recent years led to the advent of LED to stimulate the development of constant circuit.In this paper,the output current feed-back amplifier which can achieve a stable current drive circuit is designed to achieve a constant-current drive high power LED lighting power.