We fabricated Er-La co-doped fiber(ELDF) with high concentration by co-doped Er,La and Al ions in core.Absorption spectrum and emission spectrum of the ELDF are obviously broadened in comparison with convertional EDF.9.0 dB/m gain and under 5.0 dB NF are achieved at C-band,the output power and NF are respectively over 17.5 dBm and under 5.5 dB at L-band.The amplification performances and nonlinearties of the ELDF are better than those of conventional EDF at C-band and L-band.We demonstrated that ELDFA provided with high output power,low NF and low nonlinearities.