The specific toxicity of incineration ash is higher than of feed wastes. It is recommended that incinerator ashes containing hazardous materials should be stabilized for safe handling and disposal. Final waste forms from melting process have good mechanical strength and chemical durability. In this paper, long-term leaching tests are peformed to investigated the elemental leach behaviors of several glassy waste forms which are fabricated from simulated radioactive incinerator ash at different mixing ratios of ash to base glass. And two theoretical models for predicting the long-term leaching behaviors are applied to the experimental results.