A novel broad-band EDFA employ a tri-port gain flattening filter（GFF） module is proposed in this paper.The new design of the EDFA with a novel setup on topology and which is different form the conventional parallel or serial topology setup.The simulation shows that the novel setup can save more than 48% EDF and improve more than 55% pump efficiency in L-band than which in the conventional EDFA while the C-band EDFA’ s properties is remained.In the experiment

we used two 980 nm pump LD with the pump power at 106.9 mW and 109.6 mW

respectively.And the two segment EDF in C-band had the length of 8.5 m and 9.6 m.In L-band we set the output power of the only one 1 480 nm pump LD at 80 mW

and the length of the L-band EDF is 19.8 m.The experiment on the novel EDFA got a result with more than 23 dB gain and less than 0.6 dB gain flattening in C+L-band.While the noise figure is less than 4.4 dB in C-band and 5.6 dB in L-band.