The scattering loss of a new mixed fluid state laser material varying with refractive index and temperature is studied experimentally. A platform of laser amplifier is established, on which the laser performance of the new material is shown by a comparison between the fluid state laser material and Nd-glass solid laser material. Experimental results show that the fluid state laser material possesses typical laser gain, but its scattering loss is sensitive to the variation of refractive index and temperature. The scattering loss can be controlled under 0.0047 cm－1 with accurate refractive index matching. The results above indicate that the method of refractive index matching is able to ensure an acceptable scattering loss of this new type of fluid state laser material, so this new material has a potential ability in high power laser systems.