A research of radiation effects on polyvinyl fluoride by means of measuring intrinsic viscosity, analysing infrared spectra and determining its loss of weight was discribed in this paper. A decrease of intrinsic viscosity and molecular weight of polyvinyl fluoride with the increase of irradiation doses was observed.,It was found that there were some new absorption peaks occuring in the IR spectra at 1640 cm,-1, 1750 cm,-1, 1845 cm,-1, and 3440 cm,-1, when the irradiation doses reached more than 1×10,4,Gy, and intensity of the peaks corresponding to 1750 cm,-1, and 1845 cm,-1, was decreased by heating treatment and that of the another peak(1640 cm,-1,) was increased at the same time. The relationship between the intensites of carbonyl and carboxyl peaks and the irradiation doseswas determined.,At the beginning the weight of irradiated polyvinyl fluoride increased, then it decreased and at last reached constant level. It was concluded that the loss of weight was related to irradiation doses and temperature.