We must take further channel regulation measures to improve the navigation environment of the hydro-junction, increase the shipping capacity of the original first-line ship lock by reconstruction and extension, and add the additional second-line ship lock on left bank of the new ship lock. According to the test results of the overall fixed-bed model of navigation building on Baishiyao hydro-junction, we study the navigation conditions after the reconstruction and extension project. For the unfavorable flow condition, we put forward reasonable and effective measures, which may be used as reference for similar projects.