To solve the problem that the signal injury and channel congestion in distributed satellite optical network are serious,which are caused by frequent switching and multi-retransmission,a regenerative wavelength conversion scheme without separated detecting laser is put forward.The scheme m akes use of self-phase modulation (SPM) in semiconductor optical amplifier (SOA) to broaden the spectru m of initial signals,and a pre-conversion signal is obtained as the detecting light passes through a red- shifted filter.Then the wavelength conversion is realized based on the four-wave mixing (FWM) in another SOA.The results sho w that the conversion efficiency can reach more than 23dB,and the Q factor improvemen t can be more than 3dB when input power is smaller than －23dBm.