The invention provides a steady flow friction reduction absorption basin, which comprises two gradual change sections, a hydraulic jump energy dissipation section and a rectification section, wherein the head part of each gradual change section is used for connecting a sluice tunnel outlet, the tail part of each gradual change section is connected with the head part of the hydraulic jump energy dissipation section, the hydraulic jump energy dissipation section is arranged in square shape or gradually widened trapezoidal shape arrangement, the rectification section is arranged behind the hydraulic jump energy dissipation section, and an outlet of the rectification section is connected with a tail threshold of the absorption basin; the tail threshold of the absorption basin is in a slope type; the two gradual change sections are respectively in gradually expanding arrangement, the bottom plate elevation of the gradual change sections is reduced along the straight line, the front ends of the gradual change sections have the same height as a bottom plate of the sluice tunnel outlet, and the tail ends of the gradual change sections are aligned with the bottom plate of the absorption basin; the middle parts and the tails of the two gradual change sections are separated by a middle guide wall; the middle guide wall is in a straight wall type, the head end of the middle guide wall is connected with the intersection part of the inner side edge walls of the two gradual change sections, and the tail end of the middle guide wall is arranged at the downstream of the hydraulic jump energy dissipation section, and the tail end of a middle separation wall is connected with a submerged rotation elimination steady flow pier. The steady flow friction reduction absorption basin has the advantages that the rotational flow in the absorption basin is eliminated or obviously weakened, and the abrasion etching damage risk of the bottom plate of the absorption basin is reduced.