As the MSW (municipal solid waste) of the counties or towns in the Three Gorges areas is simply piled up, the piling-up yard has occupied large amount of land and will pollute the earth and water environment. So it is very important to judge whether a MSW piling-up yard is stabilized for the lands' reuse and pollution prevention. The accuracy of judgment depends on the index system of stabilization. The index system is established and the correlation between lixivium COD, organic matter, age of piling-up etc., are also analyzed. The index system is confirmed and the evaluation standard is also established.