Abstract: It is very important to carry out studies of conjugate water depth and length of hydraulic jump for design of the corrugated beds of the stilling basin. According to the test data about characteristics of the hydraulic jump in the existing literatures, the change laws of the conjugate water depth, length of roller, length of the hydraulic jump and energy dissipation ratio with upstream Froude number, roughness height, initial depth of free hydraulic jump, sequent depth of the hydraulic jump are studied. The semi-theoretical formula of the conjugate water depth, and the fitting formulas of the length of roller, length of the hydraulic jump are put forward and verified using the test results. The mean errors of the conjugate water depth are respectively 4.5% and 3.3%, and the length of roller and the length of the hydraulic jump are respectively 7.4% and 5.9%. The analysis results show that the sequent depth and the length of hydraulic jump are not only related to the upstream Froude number, and also to the roughness height of the wall surface. The energy dissipation ratio of the corrugated beds is much more than that on the smooth bed, that increases with the increase of the roughness height of the wall surface under the same upstream Froude number.