In order to establish the relationship between the characteristics of t he near-infrared signal and the phase holdups of different gas-liquid two-phase flows,based on Lambert-Beer′ s law and the absorbance of substances,the relationship between the near-infrared received signal and the phase holdups of the gas-liquid two-phase flow Inquiry.The eight-channel near-infrared detection device was installed in the multiphase flow experimental system of Hebei University,and a total of 87sets of operating poi nts under the three flow patterns of bubbly flow,annular flow and slug flow were carried out in multiple sets of experiments.A corresponding phase holdup measurement model was established for the bubbly flow model.The relative error of the liquid phase holdup of the bubbly flow model is within ±3%;the relative error of the gas holdup of the annular flow model is within ±3%; the relative error of the liquid phase holdup of the slug flow model is within ±5%,and the established gas-liquid two-phase flow volume holdup measurement model is effective.It is proved that it is feasible to establish the phase hold up model of gas-liquid two-phase flow based on the near-infrared theory,which provides a reliable method for tw o-phase flow detection.