Abstract: The radioactive--decay curve analysis and radioactive--decay coefficient methodare used to determine the impurity ~(66)Ga from the ~(67)Ga with a radioactivity meter.For analysed considerable specimens, it is clear that the results are consistent withthe theoretical calculation and multiple γ-spectra technique. The methods of deter-mination impurity ~(66)Ga are significant for the qualification test of the radioactivepharmaceuticals and the true dingnose of sufferers because the equipments are verysimple and it should be used in Reneral hospitals conveniently.