A novel structure high power and ultra bandwidth superfluorescence source is reported in this paper. With bi-directional pump of 980 nm LD and 1480 nm LD, C+L band ASE reflected by fiber loop mirror is got. By adjusting the power of LDs, 76.6 nm bandwidth from 1524.0 to 1600.6 nm is acquired where the ASE power is higher than -18.8 dBm, and from 1539.2 nm to 1600.6 nm (61.4 nm), the flatten of ASE is within 2.8 dB. The total ASE power is 22.1 mW and the power conversion rate is 18.8%. Without the fiber loop mirror, only C band ASE from 1525 to 1565 nm is got while the pump condition remains the same. The total ASE power is 7.1 mW and the power conversion rate is only 6%. From the experiment, the best ultra bandwidth superfluorescence source with the ASE power of 28.5 mW and the power conversion rate of 22.3% is acquired by adjusting the bi-directional pump power of LDs and using fiber loop mirror.