Considering the limited attraction flow for fish near the navigation and electricity junction in the mountain river，flow conditions near the fish way entrance are investigated by two-dimensional flow numerical simulation for the Lize project in the Jialingjiang River. The flow fields at the entrance of the fish way under 5 different layout schemes are compared and analyzed. The results show that the combination of guide wall on the bank side of the fish way entrance and reverse arc breakwater head and diversion pier on the main channel side can significantly improve the flow conditions at the fish way entrance. For this project，the straight guide wall is designed to be 6 m long，and then it is connected with the bank slope with an arc （R=18 m）；the reverse arc breakwater head is cut at an angle of 45°；two diversion piers are employed outside the beveled edge wall and both dimensions are 1.2 m × 0.8 m，which are separated by 1.2 m.