90SrF2 and waste with high content of Na2O, Fe2O3, P2O5 are two kinds of waste generated from nuclear power plants. Glass wasteforms composed mainly of SrF2, Na2O, Fe2O3 and P2O5 can be prepared when the two kinds of wastes are combined to solidify. Glass forming ability, actual composition, structure and thermal stability of samples in SrF2-Na2O-Fe2O3-P2O5 system were investigated by X-ray fluorescence spectrometer, X-ray diffractive spectrometer, infrared spectrometer, thermal expansion instrument and differential thermal analyzer. The water resistance was studied by dissolution rate method and product consistency test method. The results show that the mass loss of Sr is little but the mass loss of F is as high as 30%~34% in glass after melting at 1 000 ℃ for 0.5 h. With the decrease of P2O5/SrF2 molar ratio, the thermal stability of glass decreases sharply, but the water resistance improves obviously. Samples with pyrophosphate glass structure have good stability, and the glass with 30% (mole fraction) SrF2 has both high water resistance and high thermal stability.