[目的 ]了解新装修住宅室内空气甲醛污染情况及其变化规律。 [方法 ]对 4套新装修住宅用变色酸比色法 ,对卧室和客厅门窗的开、关及门窗关、闭 ,橱门开、关等不同状态进行甲醛浓度分析。 [结果 ]室内空气的甲醛浓度是室外的 6 .6 5倍 ,为 0 .492 mg/ m3;在门窗关闭时甲醛 10 0 %超标 ;门窗开与关之间甲醛浓度有非常显著差别 ;甲醛浓度与测定日期成负相关 ,与室温成正相关 ;橱门开与关之间甲醛浓度的差别亦有非常显著性意义。 [结论 ]用人工胶合板制作的家具是室内空气甲醛的主要污染源 ,常开门窗 ,加强通风 ,是降低甲醛浓度的主要办法。 [Objective] To understand the indoor formaldehyde pollution in newly renovated residential buildings and its changing rules. [Method] The colorimetric method of chromogenic acid in 4 newly renovated houses was used to analyze the formaldehyde concentration in open and closed doors and windows in the bedroom and living room and in different states such as door, window, door opening and closing. [Result] The formaldehyde concentration of indoor air was 6.66 times of the outdoor value, which was 0.492 mg / m3. The formaldehyde concentration exceeded 10% when the doors and windows were closed. The formaldehyde concentration between doors and windows was very different. The formaldehyde concentration Negatively correlated with the determination date, and positively correlated with room temperature; the difference of formaldehyde concentration between the opening and closing of the cabinet door also has a very significant significance. [Conclusion] The furniture made of artificial plywood is the main pollution source of formaldehyde in indoor air. It is the main method to reduce the concentration of formaldehyde by opening doors and windows and strengthening ventilation.