Purification method of condensed water

The invention provides a purification method of condensed water, and relates to the technical field of water treatment. The purification method comprises the steps that a trace amount of activating agent is added into the condensed water, and the main pollutant ferric oxide in the condensed water rapidly reacts and is activated into iron hydroxyl hydrated complex cations with agglutination capacity; the generated iron hydroxyl hydrated complexing cations are quickly subjected to complexing reaction with other negatively charged pollutants such as silicon dioxide and organic matter in condensed water to form an iron ion complex with low zeta potential; then, through a same low-zeta-potential granular MS filter material layer, the low-zeta-potential iron ion complex in the water is strongly adsorbed, intercepted, accumulated and concentrated in the filter layer, so that the filtered condensed water can be purified, and the filtered water quality meets or is superior to the water quality requirement of entering