Abstract: In order to systematically study the influence of attached radon progeny, the collection efficiency of attached radon progeny by different screens in the same environment was evaluated based on theoretical analysis and experimental measurement, and the influence of attached radon progeny was analyzed when the same screen was used in different environments. The results show that the single screen with different mesh numbers have lower collection efficiency (0.7%-1.0%) for attached radon progeny. However, due to the high fraction of attached radon progeny (about 92%) in typical indoor environment, the measured value of the unattached fraction of radon progeny has a systematic positive deviation (3.1%-9.5%). This systematic positive deviation increases with the grading of screen mesh number. When the same screen is directly applied to outdoor and mine environment from indoor environment, the coarse particle mode radon progeny will cause large deviation in the measured result of unattached fraction of radon progeny. The theoretical calculation results show that the deviation calculation values of typical outdoor and mine environment was 40.3% and 113% respectively, which indicates that it is necessary to optimize the screen in different environments to reduce the measurement deviation of the unattached fraction of radon progeny.