Abstract: Aiming at the problem of energy utilization of low-velocity turbines in irrigation canals, this paper proposes a fishtail vertical shaft impeller with dual-drive design, and uses the method of combining CFD numerical simulation with physical model test to analyze the hydrodynamic properties and power of the impeller. The results show that for the micro-water flow turbine equipped with the deflector cover, the dual-drive design can increase the energy utilization rate; the imitation fishtail can optimize the rotation performance of the impeller; the imitation fishtail double-drive vertical axis impeller has better energy utilization and hydrodynamic performance than the ordinary horizontal impeller at the low flow rate of the micro-water head.