The crosstalk-to signal ratio and the power penalty caused by double Rayleigh scattering of different fiber Raman amplifiers are investigated. Under the same pump power, the gain of dispersion shifting fiber Raman amplifier is the highest, and its crosstalk-to signal ratio and power penalty are also the highest. The double Rayleigh scattering noise performance of fiber Raman amplifier decreases rapidly as the pump power increases.