500kW Ocean Energy Isolated Power System demonstration project is the first batch of project, which funded by the National Marine Renewable Energy Special Fund. The 2×100kW tidal current energy generation device is an important part of the demonstration project. The hydrodynamic performance analysis of tidal current turbine is the most critical basic work in the design of turbine, and it is the foundation for subsequent design and analysis of tidal current energy generation device design. Based on the Tidal Bladed software, the calculation model hydrodynamic performance of the turbine of 2×100kW tidal current energy generation device was established in this paper. The efficiency curve and load of turbine have been calculated under steady flow velocity, and the influence of tower shadow and turbulence intensity on the hydrodynamic performance of the turbine have been studied.