To solve the problem of original discharge tunnel of Louzhuangzi Reservoir Project, the lateral energy dissipation and vertical energy dissipation schemes were proposed for the original picking nose scheme, using the physical hydraulic model test method. By comparing the water tongue morphology and downstream river channel scouring and silting form, the lateral diffusion energy dissipation scheme was found better than the vertical diffusion scheme. Furthering analysis the characteristics of the diffusion angle, the pitch, the scouring and silting morphology of the lateral diffusion scheme resulted the recommended scheme is the moderate diffusion angle tongue-shaped nasal ridge scheme. The results showed that the tongue-type jet buckets can form a water tongue that is continuous and smooth, and the diffusion is sufficient. In addition, it increased the water inlet area and reduced the single width flow and the downstream river channel erosion. The results can provide reference for the optimization of structural forms and design applications of similar projects.