Experimental study of recycling strontium chloride from strontium waste residues was conducted with ammonia chloride as the leaching solvent. The effects of the granule diameter of strontium waste residues, the extraction time, the mass ratio between liquid and solid and the n(NH4Cl)/n(Sr) on the conversation ratio was investigated using orthogonal and single factor experiments. The results show that the optimal strontium conversation condition includes strontium waste residues of 0.054 mm in size, a twohour extraction time, a 3.3 mass ratio between liquid and solid, and 3.8 n(NH4Cl)/n(Sr). Under these conditions, the highest strontium conversation ratio reached 96%. The kinetics of the conversion process is fractal.