Transport of fluid at the nanoscale is crucial for the design and fabrication of nanofluidic devices.Carbon surfaces, like graphite, were assumed as hydrophobic.However, carbon nanotubes can allow anomalously fast transport of water molecules, from both experimental and theoretical results.In this work, our aim is to investigate (1) whether water molecules can penetrate into ultra-narrow channels between two graphene plates with the gap of less than one nanometer;(2) how about the molecular configuration of water confined in graphene Nanochannels;(3) how about the flow behavior of water in this channel.