Abstract: Sample for XRFS analysis was prepared by grinding the semi-finished strontium ferrite sample with starch in an agate mortar, and pressing the mixture in the sample moulder under a pressure of 30 t. The contents of Fe, Sr and Si were determined by XRFS. The optimum mass ratio of sample to starch was found to be 5 to 1. The proposed method was used in the analysis of samples of semi-finished product of strontium ferrite, values of RSD′s (n=11) found for the above 3 elements were 0.06%, 0.14%, 0.70% respectively. The results obtained were in consistency with those obtained by the conventional methods.