Abstract: ObjectiveTo explore the major pollution,the pollution condition and the effect to health in decorated houses.MethodsDecorated houses within 6 months in Changchun were selected with the method of cluster radom sampling.To examine densities of formaldehy de,ammonia,total volatile organic compounds(TVOC)and complete questionaire.ResultsFormaldehyde and VOCs were the major air pollutions in decorated houses.Formaldehy de exposure increases 5 mg/m³ every time,the risk increases 2.833,8.751,2.452 and 3.102 times separately on the central nervous system reactions,the irritation symptoms of eyes,noses and throat,the respiratory system reactions and the skin allergic reactions.With TVOC exposure increasing,the risk increases 2.776 and 2.044 times separately in the central nervous system reactions and the respiratory system reactions.ConclusionFor maldehy de exposure was connected with the central nervous system reactions,the irritation symptoms of eyes,noses and throat,the respiratory system reactions and the skin allergic reactions in decorated houses.TVOC exposure was connected with the central nervous system reactions and the respiratory system reactions in decorated houses.