In order to determine the basic parameters of the natural-like fishway design of Minjiang Qianwei navigation-power junction and the rationality of the fishway layout，the swimming ability of the fish caught in the surrounding rivers is tested on the spot，the flow conditions in entrance and exit of fishway are verified by the hydrodynamic calculation of the two-dimensional mathematical simulation model，and the hydraulic characteristics of the natrual-like fishway are researched by physical model. The design plan is proposed：1）The fishway design level should be determined by the combination of guarantee rate of flow and the level of power generation.2）The nature-like fishway is arranged on the stockpile body on the left side of the power plant. The fishway and its transversal partitions are all made of gabions，and water supplement measures are arranged at the entrance of the fishway.The experimental results show that the designed velocity of Qianwei fishway is no more than 1.20 m/s，and the velocity distribution of each chamber in the fishway is diversified，which meets the hydraulic conditions of the fish.