The potassium feldspar powder with high concentration of Fe2O3 was obtained by pretreating the potassium_rich shale from Jiangsu Province and used as the main starting materials. 13X zeolites were synthesized by baking and hydrothermally synthesizing procedures. The optimal technical parameters were determined by means of quadrature experiments. The properties of the synthetic zeolite are similar to those of the industrial 13X zeolite and its absorbability meets the state standards of chemical industry of China. The synthetic zeolite can be used to treat the waste water with heavy metal cations.