The amount of residual solvent in polymer blend membrane has a close relationship with the drying process, which influences the performance of the coating film. The drying process of polystyrene(PS)/polycarbonate(PC) blend solution in dichloromethane was investigated by using the quartz crystal microbalance(QCM) and self-made forced air convection drying device, where the blending ratio, hot airflow speed and temperature were varied. The experimental results were correlated by a creep transport model. The correlations show that the drying rate is greatly affected by the blending ratio of PS/PC. Because the hydrogen bonds between interchains can induce the crystallization in PC microphase, which blocks the transport of solvent molecules in PC, the infinitely dilute diffusion coefficient of solvent decreases with the increase of PC contents in polymer blend. Therefore, it is important to choose the proper polymer-solvent system for reducing the residual solvent and improving the product quality in coating process.