A type of horizontal double-channel mixed flow hydraulic turbine was designed referring to the low specific speed francis turbine blade design principle and double-suction pump structure,and we investigated the design programs of the guiding device with different guide vanes,and evaluated the performance of hydraulic turbine from the qualitative and quantitative.The results indicated that,it was not good for water flow by using the conventional vane with thick head,and in the diversion components and guiding device with energy loss seriously,but the hydraulic turbine with the negative curvatur...