Abstract Fuel tanks are a core component in satellites that manage the propellant. This study numerically analyzed the fluid transport with parallel guide vanes in a vane type surface tension tank. In this paper, the numerical simulation analysis is carried out for the fluid transmission performance of the parallel vane of the new generation plate surface tension tank, and the influence of vane width on the transmission performance of vane is studied. The results show that, in the whole capillary flow stage, the liquid flow rate increases with the increase of the width a of the guide plate.