Abstract: In order to investigate the treatment of yeast precipitate after the adsorption of Sr²⁺ and the secondary use of Sr²⁺,  the flocculate was burned under different burning temperature and burning time, then the products of incineration were analyzed through X-ray diffraction(XRD), X-ray fluorescence(XRF), scanning electron microscope/energy dispersion spectrum(SEM-EDS) and thermal gravity(TG-DTG). The burning products of Sr²⁺ were further dealt with acid leaching extraction and concentration. The results show that: the temperature is 1 200 ℃; the incineration time is 1.0 h; the sample volume reduction ratio and quality reduction ratio are 92.9% and 91.0% respectively. The burning products are mainly composed of Al₂O₃, AlPO₄, Sr₅Al₂O₈. When the pyrolysis temperature is mainly concentrated below 800 ℃, the quality loss ratio is about as high as 90.0%. In the experiment of nitrate leaching Sr²⁺, when the nitric acid concentration is 3 mol/L and the leaching time is 60 min, the leaching rate of Sr²⁺ is 98.1%, and the concentration ratio is 86.1%.