The invention discloses a hydraulic instrument base, which comprises abrasion-resistant concrete, an epoxy mortar cover plate and a seamless steel tube, wherein the epoxy mortar cover plate and the seamless steel tube are embedded in the abrasion-resistant concrete. The seamless steel tube is arranged under the epoxy mortar cover plate; the bottom portion of the seamless steel tube is provided with dry fine sands; a cavity for placing a hydraulic monitoring instrument is arranged above the dry fine sands in the seamless steel tube; and epoxy mortar is filled in the seamless steel tube around the cavity. A metal cover plate is changed into the epoxy mortar cover plate; the universal base is internally provided with the hydraulic monitoring instrument, is filled with the dry fine sands in the lower portion and filled with the epoxy mortar in the upper portion, thereby preventing the risk of causing the structure safety problem due to damage of the universal base of the hydraulic monitoring instrument under the function of high-velocity flow; and effectiveness of the hydraulic monitoring instrument is ensured. The hydraulic instrument base is small in technical risk, simple and practicable and convenient to construct, and can be widely applied to the universal base of the hydraulic monitoring instrument.