~188Re labelled stannic sulfur suspension was prepared with two-steps: At firstacid ~188Re labelled suspension was obtained by adding stannous chloride into acidicsolution of ~188Re perrhenate and sodium thioslphate
then adjust the pH of thesolution to neutral point with NaOH and Na2HPO4 and 188Re labelled stannic sulfursuspension was formed. The particles sizes of this suspension were 2-5 U m mainly.The radiochemical purity was above 95%. The suspension was stable in vitro andvivo tests. Finally
animal experiments observed that the tumor inhibiting rate of this~188Re labelled stannic sulfur suspension was 90% in human glioma bearing nude mice.