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It is important to know the mechanisms of water molecules across carbon-based nanochannels, which is not only beneficial for understanding biological activities but also for designing various smart devices. Here we review the recent progress of research for water transfer across carbon-based nanochannels. In this review, we summarize the recent methods which can affect water molecules across these nanochannels. The methods include exterior factors (i.e., dipolar molecules and gradient electric fields) and interior factors (namely, cone-shaped structures, nonstraight nanochannels, and channel defects). These factors can control water permeation across nanochannels efficiently.