The invention provides a water turbine volute overhaul device, and belongs to the technical field of water turbine volute equipment detection. The water turbine volute overhaul device is characterizedby comprising an outer bracket and an inner bracket arranged in the outer bracket, and further comprising a sliding component and a limiting component arranged on the outer bracket and the inner bracket; the outer bracket comprises an underframe A and an upper frame A; the inner bracket comprises an underframe B and an upper frame B. The water turbine volute overhaul device provided by the invention has the beneficial effects of simple structure, convenient use and convenient adjustment of the use height.